Synonyms|464Antonyms|104|Broader|6Narrower|16Related|848
1
not sure
1
obscure(uncertain, shaky, vague, unclear, ambiguous)
1
of two minds
1
on the fence(adjective, undecided)
1
on thin ice(expression, adjective, idiom, delicate, uncertain)
1
open to question(adjective, uncertain, doubtful, dubious, suspect)
1
outline(mark, edge, trim, border, channel)
1
outside
1
pending(open, uncertain, shaky, unclear, unsure)
1
perilous(adjective, delicate, uncertain, unstable, doubtful)
1
peripheral(adjective, minor, outside)
1
prong(noun, top, point, limit, extreme)
1
rimming
1
risky(adjective, weak, delicate, uncertain, unstable)
1
rocky(adjective, weak, delicate, uncertain, unstable)
1
rootless(adjective, uncertain, nervous, doubtful, shaky)
1
rugged(adjective, delicate, uncertain, unstable, doubtful)
1
running hot and cold
1
sceptical
1
sensitive(adjective, weak, delicate, uncertain, unstable)
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APASmart Define. (2015). borderline thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/borderline/thesaurus/synonyms
ChicagoSmart Define. 2015. "borderline thesaurus" https://smartdefine.org/borderline/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, borderline thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/borderline/thesaurus/synonyms>.
MLASmart Define. "borderline thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/borderline/thesaurus/synonyms>