Synonyms|554Antonyms|82|Broader|1Narrower|5Related|175

260 entries under adjective topic. ×

7
portentous(importance, valuable, main, notable)
7
purposeful(importance, valuable, main, notable)
7
remarkable(importance, valuable, main, notable)
7
responsible(importance, valuable, main, notable)
7
significative(importance, valuable, main, notable)
7
solemn(importance, valuable, main, notable)
7
substantial(importance, valuable, main, notable)
7
vital(importance, valuable, main, notable)
6
counteracting(verb, opposing, oppositional, defying)
6
demanding(hard, tough, severe, difficult)
6
objecting(verb, opposing, disagreeing, oppositional)
6
protesting(verb, opposing, oppositional)
6
provoking(verb, stimulating)
6
questioning(verb, questioning)
5
arduous(hard, great, tough, severe)
5
resisting(verb, opposing, oppositional, defying)
5
rousing
5
stubborn
4
antagonizing(verb, opposing, disagreeing, oppositional)
4
confrontational(stimulating, defiant, provoking, oppositional)
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APASmart Define. (2016). challenging thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/challenging/thesaurus/synonyms
ChicagoSmart Define. 2016. "challenging thesaurus" https://smartdefine.org/challenging/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, challenging thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/challenging/thesaurus/synonyms>.
MLASmart Define. "challenging thesaurus" 2 March 2016. Web. 22 September 2026. <https://smartdefine.org/challenging/thesaurus/synonyms>