Words That Start with OS

2-letter words that start with OS

• os2n. Synonym of bone.

3-letter words that start with OS

• ose3n. An esker.
• osh6n. A Tajik dish of rice cooked with meat and oil; a kind of pilaf.
• oss3v. To set about, or intend be inclined to set about (doing something).

4-letter words that start with OS

• oses4n. The various sugars ending in -ose, such as sucrose, lactose, glucose...
• osha7n. A perennial herb of species Ligusticum porteri, found in parts of the...
• oshi7n. A person's favorite VTuber, idol, or character, especially one they...

5-letter words that start with OS

• oscar7n. A cichlid fish of species Astronotus ocellatus, native to South...
• osier5n. A willow, of species Salix viminalis, growing in wet places in Europe...
• ossia5n. In a musical score, an alternative version of a passage, usually just a...
• osteo5n. Osteomyelitis.
• ostro5n. A southerly Mediterranean wind.

6-letter words that start with OS

• oscuro8n. A cigar made with very dark tobacco.
• osetra6n. Caviar made from the Russian sturgeon.
• oshana9n. A kind of seasonally inundated depression, particularly in Namibia's...
• osmium10n. A chemical element (symbol Os) with atomic number 76: a hard, brittle...
• osmose8v. To diffuse by osmosis.
• osprey11n. A bird of prey of genus Pandion that feeds on fish and has white...
• ossify12v. To transform (or cause to transform) from a softer animal substance...
• ostend7v. To exhibit or show.
• ostium8n. A small opening or orifice, as in a body organ or passage.
• ostler6n. A person employed at an inn, hostelry, or stable to look after horses...
• ostomy11n. A surgical procedure to provide an exit point for the waste of an...
• ostrog7n. A small Russian fort, typically wooden, encircled by a palisade wall.

7-letter words that start with OS

• osculum11n. The main opening in a sponge from which water is expelled.
• osmosis9n. The net movement of solvent molecules, usually water, from a region of...
• osmotic11adj. Relating to, or powered by, osmosis.
• osmunda10n. A fern of the genus Osmunda, especially the royal fern, Osmunda regalis.
• osseous7adj. Of, relating to, or made of bone; bony.
• ossuary10n. A container, receptacle, or building, such as an urn or vault, for...
• osteoid8adj. Of, pertaining to, or characteristic of bone; bonelike.
• osteoma9n. A benign bony tumour that typically grows on the skull.
• osteria7n. A small local restaurant in (usually rural) Italy.
• ostrich12n. A large flightless bird of the order Struthioniformes.

8-letter words that start with OS

• ossified12adj. Having undergone the process of ossification (transformation into bone...
• osteitis8n. Inflammation of bone.
• ostinato8n. A piece of melody, a chord progression, or a bass figure that is...
• ostracod11n. Any of many small crustaceans, of the class Ostracoda, that resemble a...
• ostracon10n. A piece of pottery or stone, usually broken off from a vase or other...

9-letter words that start with OS

• oscillate11v. To swing back and forth, especially if with a regular rhythm.
• osmanthus14n. Any of several widely distributed evergreen flowering plants, of the...
• ostensive12adj. Apparently true, but not necessarily; ostensible.
• osteology13n. The scientific study of the morphology and pathology of bones.
• osteopath14n. A non-physician healthcare practitioner who practices osteopathy by...
• osteotomy14n. The surgical procedure of cutting a bone. This is often performed to...
• ostracism13n. In ancient Athens (and some other cities), the temporary banishment by...
• ostracize20v. To ban a person from a city for five or ten years through the procedure...

10-letter words that start with OS

• oscillator12n. A tuned electronic circuit used to generate a continuous output...
• osculating13adj. Having three or more points coincident with another.
• osmolality15n. The molality of an ideal solution that would exert the same osmotic...
• osmolarity15n. The osmotic concentration of a solution, normally expressed as osmoles...
• ostensible12adj. Apparent, evident; meant for open display.
• ostensibly15adv. Seemingly, apparently, on the surface; supposedly, according to...
• osteoblast12n. A mononucleate cell from which bone develops.
• osteoclast12n. A large multinuclear cell associated with the resorption of bone.
• osteogenic13adj. Of, or relating to, osteogenesis.
• osteolysis13n. The resorption or dissolution of bone tissue.
• osteolytic15adj. Of, pertaining to, or causing osteolysis.
• osteopathy18n. The branch of therapy based on manipulation of bones and muscles.
• osteopenia12n. The medical condition of having low bone density, but not low enough to...
• ostracized22adj. Blackballed.

11-letter words that start with OS

• oscillating14adj. Moving in a repeated back-and-forth motion; coming and going.
• oscillation13n. The act of oscillating or the state of being oscillated.
• oscillatory16adj. That oscillates; oscillating.
• oseltamivir16n. An antiviral drug that is taken orally in the form of its phosphate...
• osmotically18adv. In an osmotic manner.
• ostentation11n. Ambitious display; vain show; display intended to excite admiration or...
• osteocalcin15n. A protein, found in bone and dentin and manufactured by osteoblasts...
• osteopathic18adj. Of or pertaining to osteopathy or osteopathic medicine.
• osteopontin13n. A sialopontin found in bone tissue.
• ostracizing23n. An act of ostracization.

12-letter words that start with OS

• oscilloscope18n. An electronic measuring instrument that creates a visible...
• ossification17n. The normal process by which bone is formed.
• ostentatious12adj. Of ostentation.
• osteoblastic16adj. Of or pertaining to an osteoblast.
• osteogenesis13n. The formation and development of bone.
• osteological15adj. Of or relating to osteology.
• osteomalacia16n. A softening of adult bones due to inadequate mineralization; the adult...
• osteoporosis14n. A disease, occurring especially in women following menopause, in which...
• osteoporotic16adj. Relating to osteoporosis.
• osteosarcoma16n. A type of cancer of the bone.

13-letter words that start with OS

• osteochondral19adj. Pertaining to bone and cartilage.
• osteomyelitis18n. An infection of the bone.
• osteonecrosis15n. Avascular necrosis.
• osteopetrosis15n. A rare hereditary disorder characterized by hard, dense bones.
• ostracization24n. The state of being ostracized.

14-letter words that start with OS

• osmoregulation17n. The homeostatic regulation of osmotic pressure in the body in order to...
• ostentatiously17adv. In an ostentatious manner; extravagantly or flamboyantly.
• osteoarthritic19adj. Affected with osteoarthritis.
• osteoarthritis17n. A form of arthritis, affecting mainly older people, caused by chronic...
• osteodystrophy26n. Any abnormal or defective development of a bone.
• osteosynthesis20n. The reduction and fixation of a bone fracture with implantable devices...

15-letter words that start with OS

• osteochondritis21n. Inflammation of a bone and its cartilage.

Questions about these words

How many words that start with OS are there?

Word.ws lists 93 words that start with OS, plus 561 rare ones.

What are common words that start with OS?

oscar, os, ostensibly, osha, ostrich, osteoporosis, oss and oscillation.

Which of the words that start with OS has the highest letter score?

osteodystrophy scores 26 points with the standard letter tile values.

Related word lists

• Words That Start with O
• Words Ending in OS
• Q Words Without U