cover glass vs cover slip

cover glass and cover slip both are nouns.

Word	Noun	Adjective	Verb	Adverb
cover glass	Yes	No	No	No
cover slip	Yes	No	No	No

As nouns, cover glass and cover slip are synonyms defined as:

cover glass and cover slip: a small and very thin piece of glass used to cover the specimen on a microscope slide

cover glass (noun)	cover slip (noun)
a small and very thin piece of glass used to cover the specimen on a microscope slide	a small and very thin piece of glass used to cover the specimen on a microscope slide