confirm Synonyms - page 3

avow accredit acknowledge affirmed affirming approbate approve ascertain assert asseverate attested attest authenticate authorize autograph aver avouch corroboratory countersign definitiveness habituate homologate identifying indorse ingrain justify legalize legitimize orientate ostend pease predicate probate profess prove radicate guaranty guarantee frap demonstrate determinateness determine diagnose endemically endorse engraft ensure entrench esoterically evidence