13 entries under imperceptible topic. ×

30
minute(noun, adjective, slight, small, tiny)
25
small(adjective, slight, small, quantity, unimportant)
24
infinitesimal(adjective, slight, big, small, limited)
7
slight(adjective, small, limited, unimportant, insufficient)
6
inappreciable(adjective, slight, small, limited, unimportant)
4
evanescent(slight, small, unimportant, commonplace, subtle)
3
inconsiderable(slight, poor, quantity, limited, insufficient)
3
insignificant(adjective, slight, small, unimportant, minute)
3
trivial(adjective, slight, poor, important, small)
2
imponderable
2
unnoticeable
1
momentary(slight, small, unimportant, commonplace, subtle)
0
unobservable
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APASmart Define. (2015). microscopic thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/microscopic/thesaurus/synonyms
ChicagoSmart Define. 2015. "microscopic thesaurus" https://smartdefine.org/microscopic/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, microscopic thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/microscopic/thesaurus/synonyms>.
MLASmart Define. "microscopic thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/microscopic/thesaurus/synonyms>