147 entries under unknown topic. ×

50
dark(adjective, secret, hidden, mysterious, unclear)
47
unclear(adjective, dull, clear, hard, weak)
43
vague(adjective, dull, clear, weak, rough)
30
shadowy(adjective, dull, clear, weak, soft)
27
indefinite(adjective, dull, clear, rough, strange)
26
indistinct(adjective, dull, quiet, clear, weak)
25
ambiguous(adjective, cover, clear, rough, dark)
22
abstruse(noun, adjective, hard, sharp, difficult)
21
cryptic(adjective, cover, sharp, difficult, dark)
21
recondite(adjective, dark, sophisticated, mysterious, secret)
20
mysterious(adjective, hard, solid, dark, strange)
20
arcane(adjective, dull, hard, difficult, solid)
19
clouded(adjective, dull, dark, gloomy, uncertain)
18
deep(adjective, hard, weak, meaning, pale)
17
nameless(adjective, knowledge, strange, unfamiliar)
16
inconspicuous(adjective, quiet, see, plain, humble)
15
doubtful(adjective, rough, dark, uncertain, unreasonable)
15
occult(noun, verb, adjective, cover, block)
14
confused(adjective, dull, flat, difficult, dark)
14
secret(adjective, quiet, dark, superior, strange)
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APASmart Define. (2016). obscure thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/obscure/thesaurus/synonyms
ChicagoSmart Define. 2016. "obscure thesaurus" https://smartdefine.org/obscure/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, obscure thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/obscure/thesaurus/synonyms>.
MLASmart Define. "obscure thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/obscure/thesaurus/synonyms>