Verbs

(v)procure, secureget by special effort“He procured extra cigarettes even though they were rationed”
(v)fasten, fix, securecause to be firmly attached“fasten the lock onto the door”, “she fixed her gaze on the man”
(v)secureassure payment of
(v)guarantee, ensure, insure, assure, securemake certain of“This nest egg will ensure a nice retirement for us”, “Preparation will guarantee success!”
(v)plug, stop up, securefill or close tightly with or as if with a plug“plug the hole”, “stop up the leak”
(v)batten, batten down, securefurnish with battens“batten ships”

Adjectives

(a)secure, unafraid, untroubledfree from fear or doubt; easy in mind“he was secure that nothing will be held against him”
(a)securefree from danger or risk“secure from harm”, “his fortune was secure”, “made a secure place for himself in his field”
(a)securenot likely to fail or give way“the lock was secure”, “a secure foundation”, “a secure hold on her wrist”
(s)impregnable, inviolable, secure, strong, unassailable, unattackableimmune to attack; incapable of being tampered with“an impregnable fortress”, “fortifications that made the frontier inviolable”, “a secure telephone connection”
(s)dependable, good, safe, securefinancially safe“a good investment”, “a secure investment”