insurance firm vs insurance company

insurance firm and insurance company both are nouns.

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

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

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

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

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