slip of paper vs sheet of paper

slip of paper and sheet of paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
slip of paper	Yes	No	No	No
sheet of paper	Yes	No	No	No

As nouns, sheet of paper is a hypernym of slip of paper; that is, sheet of paper is a word with a broader meaning than slip of paper:

Other hypernyms of slip of paper include piece of paper, sheet.

slip of paper (noun)	sheet of paper (noun)
a small sheet of paper	paper used for writing or printing