19
unclear(adjective, unintelligible, unreadable)
13
unreadable(adjective, incoherent, incomprehensible, unintelligible, inarticulate)
9
indecipherable(adjective, small, restricted, incomprehensible, unintelligible)
9
obscure(adjective, understood, unreadable)
7
unintelligible(adjective, understandable, unreadable)
6
indistinct(adjective, vague, incoherent, incomprehensible, unreadable)
5
crabbed(adjective, unreadable)
4
mysterious(adjective, unintelligible)
4
cryptic(adjective, unintelligible)
4
enigmatic(adjective, unintelligible, unintelligibility)
3
undecipherable(adjective, unreadable)
3
faint(adjective, unreadable)
3
cramped(adjective, restricted, confined, overcrowded, unreadable)
3
incomprehensible(adjective, incoherent, indecipherable, inarticulate, scrawled)
3
scrawled(adjective, unreadable, indecipherable)
3
vague
2
confused
2
confusing(adjective, unintelligible)
2
foggy
2
foul
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APASmart Define. (2016). illegible thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/illegible/thesaurus/synonyms
ChicagoSmart Define. 2016. "illegible thesaurus" https://smartdefine.org/illegible/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, illegible thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/illegible/thesaurus/synonyms>.
MLASmart Define. "illegible thesaurus" 10 March 2016. Web. 20 September 2026. <https://smartdefine.org/illegible/thesaurus/synonyms>