safe

n.

[1]	condom , rubber , safety , prophylactic
[2]	vault , crypt , strongbox , safe-deposit/safety-deposit box , coffer , chest , repository

adv.

[1]	safely , securely

adj.

[1]	unharmed , whole , uninjured , unhurt , (safe and) sound , secure , protected , shielded , sheltered , out of harm's way , all right , (Colloq) OK/okay
[2]	harmless , non-toxic , non-poisonous , innocuous , unpolluted
[3]	sure , secure , sound , protected , risk-free , riskless , safe as the Bank of England , reliable , dependable , solid , bona fide , conservative , tried and true , (Brit) safe as houses
[4]	all right , allowable , permissible , acceptable , satisfactory , appropriate , suitable , timely , right , correct , proper , justifiable , justified , (Colloq) OK/okay
[5]	secured , protected
[6]	dependable , good , secure