acknowledge
admit
affirm
allege
announce
annunciate
argue
assert
assever
asseverate
assure
attest
authenticate
aver
avow
bear witness
certify
confess
confirm
contend
corroborate
countersign
declaration
declare
depone
depose
disclose
enunciate
evidence
express
express the belief
give evidence
guarantee
have
hold
insist
issue a manifesto
lay down
maintain
make a promise
manifesto
own
pledge
plight
predicate
proclaim
profess
avouched
avouches
avouching