smegma vs sebum

smegma and sebum both are nouns.

Word	Noun	Adjective	Verb	Adverb
smegma	Yes	No	No	No
sebum	Yes	No	No	No

As nouns, sebum is a hypernym of smegma; that is, sebum is a word with a broader meaning than smegma:

smegma: a white secretion of the sebaceous glands of the foreskin
sebum: the oily secretion of the sebaceous glands; with perspiration it moistens and protects the skin

smegma (noun)	sebum (noun)
a white secretion of the sebaceous glands of the foreskin	the oily secretion of the sebaceous glands; with perspiration it moistens and protects the skin