class fellow vs acquaintance

class fellow and acquaintance both are nouns.

Word	Noun	Adjective	Verb	Adverb
class fellow	Yes	No	No	No
acquaintance	Yes	No	No	No

As nouns, acquaintance is a hypernym of class fellow; that is, acquaintance is a word with a broader meaning than class fellow:

Other hypernyms of class fellow include friend.

class fellow (noun)	acquaintance (noun)
an acquaintance that you go to school with	personal knowledge or information about someone or something
	a person with whom you are acquainted
	a relationship less intimate than friendship