17 entries under imperceptible topic. ×

12
indistinct(adjective, obscure, ambiguous)
11
invisible(adjective, knowledge, obscure, dark, subtle)
9
faint(adjective, unclear, subtle, hazy)
8
vague
7
inappreciable(adjective, knowledge)
7
obscure(adjective, solid, dark, unknown, dense)
7
undetectable(adjective, subtle, indistinguishable, unremarkable)
6
unnoticeable(adjective, knowledge, subtle, unremarkable)
6
unobservable(adjective, knowledge, invisible)
4
imponderable(adjective, knowledge)
4
inaudible(adjective, unclear, subtle, hazy)
4
unseen(adjective, obscure, dark, unknown, hidden)
3
shadowy(adjective, obscure, dark, unknown, subtle)
1
occult(obscure, dark, unknown, hidden)
1
screened(obscure, dark, unknown, hidden)
1
undisclosed(obscure, dark, unknown, hidden)
1
ungraspable(solid, dense, unfathomable, unseen)
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APASmart Define. (2015). indiscernible thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/indiscernible/thesaurus/synonyms
ChicagoSmart Define. 2015. "indiscernible thesaurus" https://smartdefine.org/indiscernible/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, indiscernible thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/indiscernible/thesaurus/synonyms>.
MLASmart Define. "indiscernible thesaurus" 13 April 2015. Web. 30 September 2026. <https://smartdefine.org/indiscernible/thesaurus/synonyms>