n. 25B6; noun
a warrant for his arrest : AUTHORIZATION, order, licence, permit, document; writ, summons, subpoena; mandate, decree, fiat, edict.
a travel warrant : VOUCHER, chit, slip, ticket, coupon, pass.
there's no warrant for this assumption : JUSTIFICATION, grounds, cause, rationale, basis, authority, licence, sanction, vindication.
25B6; verb
the charges warranted a severe sentence : JUSTIFY, vindicate, call for, sanction, validate; permit, authorize; deserve, excuse, account for, legitimize; support, license, approve of; merit, qualify for, rate, be worthy of, be deserving of.
we warrant that the texts do not infringe copyright : GUARANTEE, affirm, swear, promise, vow, pledge, undertake, state, assert, declare, profess, attest; vouch, testify, bear witness; formal aver.