104 entries under verb topic. ×

2
facing(confronting, defying)
2
impugning
2
meddling(opposing, counteracting)
2
negating
2
probing(adjective, questioning)
2
rebelling
2
refuting
1
abnegating
1
abrogating
1
affronting
1
arguing
1
bickering
1
calling
1
canvassing
1
catechizing
1
checking
1
claiming
1
clashing
1
colliding
1
competing(adjective, rival, opposing)
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APASmart Define. (2016). challenging thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/challenging/thesaurus/synonyms
ChicagoSmart Define. 2016. "challenging thesaurus" https://smartdefine.org/challenging/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, challenging thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/challenging/thesaurus/synonyms>.
MLASmart Define. "challenging thesaurus" 2 March 2016. Web. 23 September 2026. <https://smartdefine.org/challenging/thesaurus/synonyms>