sebaceous follicle vs oil gland

sebaceous follicle and oil gland both are nouns.

Word	Noun	Adjective	Verb	Adverb
sebaceous follicle	Yes	No	No	No
oil gland	Yes	No	No	No

As nouns, oil gland is a hypernym of sebaceous follicle; that is, oil gland is a word with a broader meaning than sebaceous follicle:

sebaceous follicle: a cutaneous gland that secretes sebum (usually into a hair follicle) for lubricating hair and skin
oil gland: a gland that secretes oil

sebaceous follicle (noun)	oil gland (noun)
a cutaneous gland that secretes sebum (usually into a hair follicle) for lubricating hair and skin	a gland that secretes oil