challenge Synonyms - page 4

ask argument argufy argue appeal anagram altercate accost beard beckon belie competition compete cavil catechize catechism call burden buck brave bicker bestir abstrusity dilemma oppose interrogation interrogate interpellation interception intercept inquire impugnment impugnation impugn impediment impeach interrogatory invitation joust obstacle objection object nonconcur mistrust misgive miserere misdoubt misbelieve matter litigate