Synonyms of thick
120 similar words · 60 opposite words
Another word for thick is fat. Other synonyms of thick are stocky, dense, wide and broad. The opposite of thick is close.
Synonyms and similar words for thick
adjectiveRelatively great in extent from one surface to the opposite in its smallest solid dimension.
adjectiveHeavy in build; thickset.
adjectiveDensely crowded or packed.
adjectiveHaving a viscous consistency.
- glutinous
- viscousHaving a thick, sticky consistency between solid and liquid (that is, a high viscosity).
- lentousViscid; viscous; tenacious.
- gooey
- slabbyOf a liquid: thick; viscous.
- stiffHaving a dense consistency; thick; (by extension) Difficult to stir.
- syrupy
- thickflowingFlowing thickly, viscous, viscid.
- treaclyOf a liquid, thick and sticky.
- viscid
- viscose
adjectiveAbounding in number.
- overflowingOverflow.
- swarming
- teeming
- aboundingAmple, plenty, abundant.
- abundant
- adequateEqual to or fulfilling some requirement.
- ample
- bountifulHaving a quantity or amount that is generous or plentiful; ample.
- brimmingFull to the brim.
- comfortable
- copious
- enough
- fecund
- fertile
- fruitful
- galoreIn abundance.
- generous
- lavish
- liberal
- luxuriant
- manysomeCharacterised or marked by abundance; plentiful, abundant; multiple.
- numerous
- plenteous
- plentiful
- profuseAbundant or generous to the point of excess; copious; volubly expressed.
- prolific
- replete
- rich
- rife
- sufficient
- wealthy
- bottomless
adjectiveImpenetrable to sight.
- opaque
- adiaphanousNot transparent; not translucent; not diaphanous; opaque.
- nontransparentNot transparent; lacking transparence; opaque.
- opacous obsolete
- opacular obsoleteOpaque.
adjectiveDifficult to understand, or poorly articulated.
- unclear
- abstruseDifficult to comprehend or understand; obscure.
- Chinese
- enigmatic
- fathomless
- Greek
- inapprehensibleThat cannot be apprehended; not apprehensible to or graspable by either body or mind.
- incognizableNot cognizable; incapable of being recognised.
- incomprehensible
- ineffable
- inenubilable formal, literaryInexplicable, mysterious, unclear.
- inexplicableImpossible to explain; not easily accounted for.
- impenetrableIncomprehensible; fathomless; inscrutable.
- insensibleUnable to be understood; unintelligible.
- inscrutableDifficult or impossible to comprehend, fathom, or interpret.
- insolubleThat cannot be explained.
- insolvable
- mysteriousDifficult to understand.
- nonunderstandableNot understandable.
- obscureDifficult to understand; abstruse.
- tenebrose figurativelyObscure; obtuse; incomprehensible.
- undecipherableNot easily deciphered; difficult to read.
- undiscoverable
- unexplainableThat doesn't have a known or readily available explanation.
- unfathomableImpossible to grasp the extent of, or to fully know or understand.
- ungraspable
- unintelligibleNot intelligible; unable to be understood.
- unknowableNot knowable; not able to be known.
- ununderstandableNot understandable; that cannot be understood.
- retruse obsolete
adjectiveStupid.
- dumb informalStupid.
- stupid
- thick as pigshit slang, vulgar
- thick as two short planks slangVery stupid.
- addlebrainedSynonym of addlepated.
- addlepatedAddled; confused; stupid; flustered.
- airheaded
- bee-brainedExtremely stupid.
- beef-wittedStupid; dull.
- soft informalFoolish.
- beefheadedStupid; dull-witted.
- beetle-headedMentally dull; stupid.
- birdbrainedSilly and frivolous; empty-headed.
- blockheadedResembling a blockhead; stupid.
- Boeotian
- boneheadedResembling or characteristic of a bonehead.
- boofheadedStupid; dimwitted.
- braindead
- brainlessUnintelligent, with little common sense.
- bubbleheadedStupid; vacuous.
- buffle-headedDull; stupid; blundering.
- bullet-headedStubborn and stupid.
- cerebrally challengedOf low intelligence; stupid.
- childish
- chowderheadedStupid; foolish; lacking in common sense.
- chuckleheadedStupid, idiotic.
- crackbrainedIdiotic.
- cretinousCharacteristic of a cretin; very stupid.
- daftFoolish, silly, stupid.
Opposite of thick
adjectiveRelatively great in extent from one surface to the opposite in its smallest solid dimension.
adjectiveHeavy in build; thickset.
- slightFoolish; silly; not intellectual.
- svelte
- gracile
- lank
- lean
- leansomeCharacterised or marked by leanness; thin.
- lithe
- lithesomeCharacterised or marked by litheness; pliant, limber, nimble, lissom.
- lissome
- rangy
- sleekSlim and streamlined; not plump, thick, or stocky.
- swack UK, dialectalLithe; nimble.
- sylphlikeResembling (that of) a sylph; slender and graceful.
- willowy
- gaunt obsoleteWith a positive or neutral connotation: not overweight; lean, slender, slim.
- slinky UK, dated
adjectiveDensely crowded or packed.
- sparse
- diffuse
- dispersedSpread out in space and/or time; not concentrated.
- incompactNot compact; not having the parts firmly united; incoherent or loose.
- loose
- noncompactNot compact.
- scattered
- spaced out
- spread out
- uncompactNot compact; incompact.
adjectiveHaving a viscous consistency.
adjectiveImpenetrable to sight.
- transparent
- clearFree of ambiguity or doubt; easily understood.
- clear as crystal
- crystalline
- diaphanous
- glassy
- hyalineGlassy, transparent; amorphous.
- hyaloidTransparent or glassy.
- limpidClear, transparent or bright.
- lucid
- pellucidAllowing the passage of light; translucent or transparent.
- perspicuousClearly expressed, easy to understand; lucid.
- see-throughTransparent or translucent; that can be seen through.
- transpicuousEasily construed or seen through.
Meaning of thick
- adjective Relatively great in extent from one surface to the opposite in its smallest solid dimension.
- adjective Measuring a certain number of units in this dimension.
- adjective Heavy in build; thickset.
thick in other languages
Questions about synonyms of thick
- What is another word for thick?
- Thick has 120 synonyms on Word.ws, such as fat, stocky, dense, wide and broad.
- What is the opposite of thick?
- The opposite of thick is close. Other antonyms of thick are fine and tight.
- What does thick mean?
- Thick means relatively great in extent from one surface to the opposite in its smallest solid dimension.
Source and license
Adapted from Wiktionary: thick (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.
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Cite this page: “Synonyms of thick.” Word.ws, https://word.ws/synonyms/thick. Based on Wiktionary, CC BY-SA 4.0.