22
vague(adjective, dull, clear, weak, soft)
19
indistinct(adjective, dull, weak, soft, gentle)
15
unclear(adjective, dull, weak, soft, gentle)
14
dim(adjective, dull, weak, soft, gentle)
14
hazy(adjective, weak, uncertain, vague, pale)
13
fuzzy(adjective, dull, rough, dark, gloomy)
12
blurred(adjective, dull, weak, soft, gentle)
12
obscure(adjective, weak, rough, dark, uncertain)
11
indefinite(adjective, rough, loose, uncertain, dim)
10
faint(adjective, dull, weak, rough, dark)
8
foggy(adjective, unclear, blurry)
8
imperceptible(adjective, weak, pale, faded)
8
pale(adjective, dull, weak, soft, gentle)
7
imprecise(adjective, rough, loose, uncertain, vague)
7
nebulous(adjective, uncertain, vague, unclear, indistinct)
7
shadowy(adjective, dull, weak, soft, gentle)
6
amorphous(adjective, unclear, indistinct, indistinguishable, baggy)
6
blurry(adjective, vague, unclear, hazy)
6
confused(adjective, weak, obscure, dark, uncertain)
6
indistinguishable(adjective, unclear, hazy, indistinct, blurry)
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APASmart Define. (2015). ill-defined thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/ill-defined/thesaurus/synonyms
ChicagoSmart Define. 2015. "ill-defined thesaurus" https://smartdefine.org/ill-defined/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, ill-defined thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/ill-defined/thesaurus/synonyms>.
MLASmart Define. "ill-defined thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/ill-defined/thesaurus/synonyms>