lien vs security interest

lien and security interest both are nouns.

Word	Noun	Adjective	Verb	Adverb
lien	Yes	No	No	No
security interest	Yes	No	No	No

As nouns, security interest is a hypernym of lien; that is, security interest is a word with a broader meaning than lien:

lien: the right to take another's property if an obligation is not discharged
security interest: any interest in a property that secures the payment of an obligation

lien (noun)	security interest (noun)
the right to take another's property if an obligation is not discharged	any interest in a property that secures the payment of an obligation
a large dark-red oval organ on the left side of the body between the stomach and the diaphragm; produces cells involved in immune responses