bound form vs morpheme

bound form and morpheme both are nouns.

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

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

bound form: a morpheme that occurs only as part of a larger construction; eg an -s at the end of plural nouns
morpheme: minimal meaningful language unit; it cannot be divided into smaller meaningful units

bound form (noun)	morpheme (noun)
a morpheme that occurs only as part of a larger construction; eg an -s at the end of plural nouns	minimal meaningful language unit; it cannot be divided into smaller meaningful units