front man vs nominal head

front man and nominal head both are nouns.

Word	Noun	Adjective	Verb	Adverb
front man	Yes	No	No	No
nominal head	Yes	No	No	No

As nouns, front man and nominal head are synonyms defined as:

front man and nominal head: a person used as a cover for some questionable activity

Other synonyms of front man include figurehead, front, straw man, strawman.

front man (noun)	nominal head (noun)
a person used as a cover for some questionable activity	a person used as a cover for some questionable activity