Security

保安

bǎo'ān

(condition of not being threatened)

保衛 /保卫

bǎowèi

(something that secures)

保證 /保证

bǎozhèng

(something that secures the fulfillment of an obligation)

保護 /保护

bǎohù

(something that secures)

安全

ānquán

(condition of not being threatened)

證券 /证券

zhèngquàn

(finance: tradeable financial asset)

防護 /防护

fánghù

(something that secures)