affix vs bound morpheme

affix and bound morpheme both are nouns.

Word	Noun	Adjective	Verb	Adverb
affix	Yes	No	Yes	No
bound morpheme	Yes	No	No	No

As nouns, bound morpheme is a hypernym of affix; that is, bound morpheme is a word with a broader meaning than affix:

affix: a linguistic element added to a word to produce an inflected or derived form
bound morpheme: a morpheme that occurs only as part of a larger construction; eg an -s at the end of plural nouns

Other hypernyms of affix include bound form.

affix (noun)	bound morpheme (noun)
a linguistic element added to a word to produce an inflected or derived form	a morpheme that occurs only as part of a larger construction; eg an -s at the end of plural nouns

affix (verb)	bound morpheme (verb)
stick or fasten to
add to the very end
attach or become attached to a stem word