insurance firm vs underwriter

insurance firm and underwriter both are nouns.

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

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

insurance firm and underwriter: a financial institution that sells insurance

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

insurance firm (noun)	underwriter (noun)
a financial institution that sells insurance	a financial institution that sells insurance
	a banker who deals chiefly in underwriting new securities
	an agent who sells insurance