cover slip vs cover glass

cover slip and cover glass both are nouns.

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

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

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

cover slip (noun)	cover glass (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