Verbs

(v)back, endorse, indorse, plump for, plunk for, supportbe behind; approve of“He plumped for the Labor Party”, “I backed Kennedy in 1960”
(v)second1, back, endorse, indorsegive support or one's approval to“I'll second that motion”, “I can't back this plan”, “endorse a new project”
(v)certify, endorse, indorseguarantee as meeting a certain standard“certified grade AAA meat”
(v)endorse, indorsesign as evidence of legal transfer“endorse cheques”