insurance firm vs insurance underwriter

insurance firm and insurance underwriter both are nouns.

Word	Noun	Adjective	Verb	Adverb
insurance firm	Yes	No	No	No
insurance underwriter	Yes	No	No	No

As nouns, insurance firm and insurance underwriter are synonyms defined as:

insurance firm and insurance underwriter: a financial institution that sells insurance

Other synonyms of insurance firm include insurance company, insurer, underwriter.

insurance firm (noun)	insurance underwriter (noun)
a financial institution that sells insurance	a financial institution that sells insurance