challenge Synonyms - page 4

altercate beckon belie abstrusity conflict competition compete catechize catechism call brave bicker bestir accost oppugn joust interrogatory interrogation interrogate interpellation interception intercept inquire impugnment impugnation litigate matter oppose obstacle objection object nonconcur mistrust misgive miserere misdoubt misbelieve impugn impediment impeach examination enquire enigma emulation doubt distrust dissent disprove disproval disobey