life belt vs safety belt

life belt and safety belt both are nouns.

Word	Noun	Adjective	Verb	Adverb
life belt	Yes	No	No	No
safety belt	Yes	No	No	No

As nouns, life belt and safety belt are synonyms defined as:

life belt and safety belt: belt attaching you to some object as a restraint in order to prevent you from getting hurt

Other synonyms of life belt include safety harness.

life belt (noun)	safety belt (noun)
a life preserver in the form of a ring of buoyant material	belt attaching you to some object as a restraint in order to prevent you from getting hurt
belt attaching you to some object as a restraint in order to prevent you from getting hurt