contend

challenge, engage, play

jockey, jostle, maneuver

go out, try out

train, work

adduce, cite, mention

claim, insist

affirm, aver, avouch, avow

advance, give, offer, propose, submit

advise, counsel, recommend, suggest, urge

convince, persuade

advocate, champion, defend, enforce, espouse, support

explain, justify, rationalize

consider, debate, discuss

confute, counter, disprove, rebut, refute

announce, broadcast, proclaim

argue, rationalize, reason

confirm, justify, vindicate

defend, persevere, support, uphold

reaffirm, reassert