sebaceous cyst vs cyst

sebaceous cyst and cyst both are nouns.

Word	Noun	Adjective	Verb	Adverb
sebaceous cyst	Yes	No	No	No
cyst	Yes	No	No	No

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

sebaceous cyst: a common cyst of the skin; filled with fatty matter (sebum) that is secreted by a sebaceous gland that has been blocked
cyst: a closed sac that develops abnormally in some body structure

sebaceous cyst (noun)	cyst (noun)
a common cyst of the skin; filled with fatty matter (sebum) that is secreted by a sebaceous gland that has been blocked	a small anatomically normal sac or bladderlike structure (especially one containing fluid)
	a closed sac that develops abnormally in some body structure