schoolfellow vs class fellow

schoolfellow and class fellow both are nouns.

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

As nouns, schoolfellow and class fellow are synonyms defined as:

schoolfellow and class fellow: an acquaintance that you go to school with

Other synonyms of schoolfellow include classmate, schoolmate.

schoolfellow (noun)	class fellow (noun)
an acquaintance that you go to school with	an acquaintance that you go to school with