chalazion vs pilar cyst

chalazion and pilar cyst both are nouns.

Word	Noun	Adjective	Verb	Adverb
chalazion	Yes	No	No	No
pilar cyst	Yes	No	No	No

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

chalazion: a small sebaceous cyst of the eyelid resulting when a Meibomian gland is blocked
pilar cyst: a common cyst of the skin; filled with fatty matter (sebum) that is secreted by a sebaceous gland that has been blocked

Other hypernyms of chalazion include sebaceous cyst, steatocystoma, wen.

chalazion (noun)	pilar cyst (noun)
a small sebaceous cyst of the eyelid resulting when a Meibomian gland is blocked	a common cyst of the skin; filled with fatty matter (sebum) that is secreted by a sebaceous gland that has been blocked