playfellow vs comrade

playfellow and comrade both are nouns.

Word	Noun	Adjective	Verb	Adverb
playfellow	Yes	No	No	No
comrade	Yes	No	No	No

As nouns, comrade is a hypernym of playfellow; that is, comrade is a word with a broader meaning than playfellow:

Other hypernyms of playfellow include associate, companion, familiar, fellow.

playfellow (noun)	comrade (noun)
a companion at play	a friend who is frequently in the company of another
	used as a term of address for those male persons engaged in the same movement