40 entries under secret topic. ×

13
hidden(verb, adjective, adverb, humble, distant)
12
invisible(adjective, adverb, obscure, dark, humble)
11
covert(adjective, hidden, imperceptible, covered)
9
inconspicuous(verb, adjective, hidden, imperceptible)
9
obscure(verb, adjective, dark, unknown)
7
out of sight(expression, adjective, idiom, adverb, view)
6
clandestine(adjective, unknown, hidden, underground)
6
unknown(adjective, obscure, dark, hidden)
5
shrouded(verb, adjective, obscure, unknown)
5
veiled(verb, adjective, hidden, imperceptible)
2
camouflaged(obscure, unknown, hidden, covered)
2
cryptic(adjective, obscure, dark, unknown)
2
disguised(obscure, unknown, hidden, imperceptible)
2
private(adjective, obscure, unknown, hidden)
2
recondite(adjective, obscure, dark, unknown)
2
unexposed(obscure, dark, unknown, hidden)
2
unrevealed(obscure, dark, unknown, hidden)
1
abstruse(obscure, dark, unknown, hidden)
1
close(obscure, dark, unknown, hidden)
1
clouded(obscure, dark, unknown, hidden)
<12>
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APASmart Define. (2015). unseen thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unseen/thesaurus/synonyms
ChicagoSmart Define. 2015. "unseen thesaurus" https://smartdefine.org/unseen/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unseen thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unseen/thesaurus/synonyms>.
MLASmart Define. "unseen thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/unseen/thesaurus/synonyms>