husband vs family man

husband and family man both are nouns.

Word	Noun	Adjective	Verb	Adverb
husband	Yes	No	Yes	No
family man	Yes	No	No	No

As nouns, family man is a hyponym of husband; that is, family man is a word with a more specific, narrower meaning than husband:

Other hyponyms of husband include benedick, benedict, cuckold, house husband, househusband, uxoricide.

husband (noun)	family man (noun)
a married man; a woman's partner in marriage	a man whose family is of major importance in his life

husband (verb)	family man (verb)
use cautiously and frugally