homegirl vs fellow member

homegirl and fellow member both are nouns.

Word	Noun	Adjective	Verb	Adverb
homegirl	Yes	No	No	No
fellow member	Yes	No	No	No

As nouns, fellow member is a hypernym of homegirl; that is, fellow member is a word with a broader meaning than homegirl:

homegirl: a fellow female member of a youth gang
fellow member: one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)

Other hypernyms of homegirl include member.

homegirl (noun)	fellow member (noun)
a fellow female member of a youth gang	one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)