life belt vs safety harness

life belt and safety harness both are nouns.

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

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

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

Other synonyms of life belt include safety belt.

life belt (noun)	safety harness (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