7 entries under microscopic topic. ×

16
imperceptible(adjective, hard, knowledge, faint, subtle)
6
unnoticeable(adjective, knowledge, subtle, imperceptible, unremarkable)
4
unseen(adjective, obscure, dark, unknown, hidden)
1
occult(obscure, dark, unknown, hidden, imperceptible)
1
screened(obscure, dark, unknown, hidden, imperceptible)
1
undisclosed(obscure, dark, unknown, hidden, imperceptible)
1
ungraspable(solid, dense, imperceptible, unfathomable, unseen)
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APASmart Define. (2015). indiscernible thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/indiscernible/thesaurus/synonyms
ChicagoSmart Define. 2015. "indiscernible thesaurus" https://smartdefine.org/indiscernible/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, indiscernible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/indiscernible/thesaurus/synonyms>.
MLASmart Define. "indiscernible thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/indiscernible/thesaurus/synonyms>