Challenging synonyms such as invite, arduous, bid, and dare. Challenging is an adjective, and its antonyms are easy and uninspiring. Additionally, here are 31 synonyms for challenging and words similar to it.
Arduous, burdensome, demanding, difficult, energizing, exacting, exciting, exigent, formidable, gruelling, hard, heavy, inspirational, inspiring, laborious, onerous, searching, stiff, stimulating, strenuous, stretching, taxing, testing, and tough.
Bid, dare, defy someone to do something, invite, summon, and throw down the gauntlet to.