96 entries under hidden topic. ×

1
hermetic(obscure, dark, deep, mysterious, unknown)
1
hermetical(obscure, dark, secret, unknown)
1
imperceivable(adjective, obscure, dark, secret, unknown)
1
irrecoverable(confused, out, lost, unchangeable)
1
irretrievable(confused, out, lost, bewildered)
1
irrevocable(confused, out, lost, unchangeable)
1
kiss goodbye(expression, out, lost, missing)
1
lacking(confused, out, lost, unchangeable)
1
minus(confused, out, lost, unchangeable)
1
mislaid(confused, out, lost, unchangeable)
1
misplaced(confused, out, lost, unchangeable)
1
missed(confused, out, lost, unchangeable)
1
missing(confused, out, lost, unchangeable)
1
mystical(obscure, dark, deep, mysterious, unknown)
1
nowhere to be found(expression, idiom, out, missing)
1
off-course(confused, out, lost, unchangeable)
1
off-track(confused, out, lost, unchangeable)
1
out the window(expression, idiom, out, missing)
1
perdu(adjective, unable, concealment)
1
recondite(obscure, dark, deep, mysterious, unknown)
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APASmart Define. (2015). invisible thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/invisible/thesaurus/synonyms
ChicagoSmart Define. 2015. "invisible thesaurus" https://smartdefine.org/invisible/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, invisible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/invisible/thesaurus/synonyms>.
MLASmart Define. "invisible thesaurus" 7 December 2015. Web. 26 September 2026. <https://smartdefine.org/invisible/thesaurus/synonyms>