4
equivocal(adjective, clear, certain, ambiguous)
4
in doubt(adjective, idiom, clear, certain, ambiguous)
4
perplexing(adjective, hard, difficult, delicate, loose)
4
tricky(adjective, hard, difficult, uncertain, complex)
4
undecided(adjective, debatable)
4
unsettled(adjective, uncertain, doubtful, dubious, questionable)
3
ambiguous(adjective, clear, obscure, certain, uncertain)
3
apocryphal
3
at issue(adjective, idiom, clear, certain, ambiguous)
3
awkward(adjective, difficult, complex, demanding, tricky)
3
borderline(adjective, clear, certain, ambiguous, debatable)
3
controvertible
3
hypothetical(adjective, uncertainty)
3
in dispute(adjective, debatable)
3
indecisive(adjective, clear, obscure, certain, uncertain)
3
indefinite(adjective, obscure, uncertain, doubtful, dubious)
3
indeterminate(adjective, clear, obscure, certain, uncertain)
3
involved(adjective, hard, difficult, delicate, loose)
3
open to question(expression, adjective, idiom, debatable)
3
paradoxical(hard, delicate, uncertainty, uncertain, complex)
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APASmart Define. (2015). problematical thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/problematical/thesaurus/synonyms
ChicagoSmart Define. 2015. "problematical thesaurus" https://smartdefine.org/problematical/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, problematical thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/problematical/thesaurus/synonyms>.
MLASmart Define. "problematical thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/problematical/thesaurus/synonyms>