impugn

verb 0.663

beg the question

verb 0.649

question

verb 0.626

doubt

verb 0.614

take issue with

verb 0.580

call in

verb 0.554

dispute

verb 0.548

discredit

verb 0.534

cast aspersions

verb 0.531

controvert

verb 0.530

challenge

verb 0.529

interrogate

verb 0.521

issue

verb 0.516

cross-examine

verb 0.510

inquire

verb 0.510

call out

verb 0.507

put the lie to

verb 0.506

put to the test

verb 0.505

bring up

verb 0.503

call on

verb 0.502