Synonyms of unknown
18 similar words · 7 opposite words
Another word for unknown is strange. Other synonyms of unknown are unidentified, unexplained, anonymous, undiscovered and obscure.
Synonyms and similar words for unknown
adjectiveNot known; unidentified; not well known.
- anonymousOf unknown name; whose name is withheld.
- unfamiliarStrange, not familiar.
- unchartedNot surveyed or mapped.
- undiscoveredThat has not been discovered; unknown, unexplored.
- unexploredWhich has not been explored.
- unidentifiedNot identified; having an unknown or unnamed identity.
- unnamed
- unrecognized
- unrevealedNot revealed; hidden; secret.
- unascertainedNot ascertained; uncertain; undetermined; unknown.
- obscureUnknown or uncertain; unclear.
- unsung
- strangeUnfamiliar, not yet part of one's experience.
- unapprehended
- unexplainedNot explained; of unknown cause or origin.
- uninvestigatedNot investigated.
- ignote obsoleteUnknown.
- knownless rareUnknown.
Opposite of unknown
adjectiveNot known; unidentified; not well known.
- well-known
- famous
- knownIdentified as a specific type; famous, renowned.
adjectiveMore antonyms
- ascertained
- familiar
- recognizableAble to be recognized.
- recognizedNotable; distinguished; honored.
Meaning of unknown
- adjective Not known; unidentified; not well known.
- noun A variable (usually x, y or z) whose value is to be found.
- noun Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
unknown in other languages
Questions about synonyms of unknown
- What is another word for unknown?
- Unknown has 18 synonyms on Word.ws, such as strange, unidentified, unexplained, anonymous, undiscovered, obscure, unascertained and unfamiliar.
- What is the opposite of unknown?
- The opposite of unknown is known. Other antonyms of unknown are recognized, recognizable, well-known, famous and ascertained.
- What does unknown mean?
- Unknown means not known; unidentified; not well known.
Source and license
Adapted from Wiktionary: unknown (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 unknown.” Word.ws, https://word.ws/synonyms/unknown. Based on Wiktionary, CC BY-SA 4.0.