secure

[1]	procure
[2]	fasten , fix
[3]	guarantee , ensure , insure , assure
[4]	plug , obtain , get (hold of) , stop up , come by , acquire , procure , win , gain , get/take possession of , arrogate
[5]	guarantee , batten , batten down , underwrite , hypothecate , collateralize
[6]	protect , shelter , shield , defend , guard , safeguard , preserve
[7]	fasten , make fast , fix , affix , attach , anchor

adj.

[1]	safe , shielded , sheltered , protected , immune , unthreatened , unexposed , unimperilled , snug , cosy
[2]	firm , steady , stable , fixed , fast , moored , anchored , immovable , closed , shut , fastened , locked (up) , tight , sound , solid , sturdy , strong
[3]	reliable , safe , good , profitable , healthy , solid
[4]	sure , certain , assured , ensured , definite , inevitable , assumed , evident , obvious , unquestionable , established , probable , easy
[5]	unafraid , untroubled
[6]	impregnable , inviolable , strong , unassailable , unattackable
[7]	dependable , good , safe