Synonyms of challenged

1 Syllable
tax, cross, claim, dare, beard, test, try
2 Syllables
defy, query, accost, confront, brave, assert, demand, impugn, exact, reclaim, summon, impeach
3 Syllables
require, provoke, inquire, arouse, denounce, impose, contested
4 Syllables
vindicate, stimulate
5 Syllables
investigate