221 entries under noun topic. ×

1
indictment
1
inhibition
1
insult(verb, disregard, oppose, ignore)
1
intractability
1
invalidation
1
knot(puzzle, riddle, enigma)
1
match(verb, oppose, play, fight)
1
mystery(difficulty, issue, question, subject)
1
neutralization
1
niggle(verb, dislike, irritate, disagreement)
1
nonagreement
1
obstruction
1
perplexity(puzzle, riddle, enigma)
1
proposition(verb, stop, go, promote)
1
reason(call, request, insult, offer)
1
rejoinder
1
repression
1
reproach
1
scrap(verb, meet, attack, fight)
1
skirmish(verb, meet, attack, fight)
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APASmart Define. (2016). challenge thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/challenge/thesaurus/synonyms
ChicagoSmart Define. 2016. "challenge thesaurus" https://smartdefine.org/challenge/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, challenge thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/challenge/thesaurus/synonyms>.
MLASmart Define. "challenge thesaurus" 1 April 2016. Web. 28 September 2026. <https://smartdefine.org/challenge/thesaurus/synonyms>