Noun

• S: (n) challenge (a demanding or stimulating situation) "they reacted irrationally to the challenge of Russian power"
• S: (n) challenge (a call to engage in a contest or fight)
• S: (n) challenge (questioning a statement and demanding an explanation) "his challenge of the assumption that Japan is still our enemy"
• S: (n) challenge (a formal objection to the selection of a particular person as a juror)
• S: (n) challenge (a demand by a sentry for a password or identification)

Verb

• S: (v) challenge, dispute, gainsay (take exception to) "She challenged his claims"
• direct troponym / full troponym
• S: (v) call (challenge the sincerity or truthfulness of) "call the speaker on a question of fact"
• S: (v) call (challenge (somebody) to make good on a statement; charge with or censure for an offense) "He deserves to be called on that"
• direct hypernym / inherited hypernym / sister term
• entailment
• derivationally related form
• W: (adj) challengeable [Related to: challenge] (capable of being challenged)
• W: (n) challenge [Related to: challenge] (questioning a statement and demanding an explanation) "his challenge of the assumption that Japan is still our enemy"
• W: (n) dispute [Related to: dispute] (a disagreement or argument about something important) "he had a dispute with his wife"; "there were irreconcilable differences"; "the familiar conflict between Republicans and Democrats"
• W: (n) disputation [Related to: dispute] (a contentious speech act; a dispute where there is strong disagreement) "they were involved in a violent argument"
• sentence frame
• Somebody ----s something
• Somebody ----s somebody
• S: (v) challenge (issue a challenge to) "Fischer challenged Spassky to a match"
• S: (v) challenge (ask for identification) "The illegal immigrant was challenged by the border guard"
• S: (v) challenge, take exception (raise a formal objection in a court of law)