214 entries under adjective topic. ×

8
feeble(calm, dull, quiet, weak)
8
gradual(calm, quiet, hard, smooth)
8
inconsiderable(hard, soft, slight, gentle)
8
inconspicuous(hard, slight, fine, thin)
8
microscopic(hard, slight, big, limited)
8
unobservable(knowledge, invisible)
8
unperceivable
8
unseen(hidden, indistinguishable, microscopic, imagined)
7
camouflaged
7
concealed(hidden, insensible, inconspicuous, unremarkable)
7
evanescent(hard, faint, subtle, insubstantial)
7
unapparent
7
unseeable(indistinguishable, unseen, microscopic)
7
weak(dull, soft, gentle, low)
6
dim(dull, weak, soft, gentle)
6
easy(calm, quiet, smooth, soft)
6
hidden(imaginary, inconspicuous, unremarkable, unseen)
6
insignificant(hard, soft, slight, gentle)
6
latent
6
obscured(insubstantial, inconspicuous, immaterial, unseen)
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APASmart Define. (2015). imperceptible thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/imperceptible/thesaurus/synonyms
ChicagoSmart Define. 2015. "imperceptible thesaurus" https://smartdefine.org/imperceptible/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, imperceptible thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/imperceptible/thesaurus/synonyms>.
MLASmart Define. "imperceptible thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/imperceptible/thesaurus/synonyms>