morpheme vs linguistic unit

morpheme and linguistic unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
morpheme	Yes	No	No	No
linguistic unit	Yes	No	No	No

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

morpheme: minimal meaningful language unit; it cannot be divided into smaller meaningful units
linguistic unit: one of the natural units into which linguistic messages can be analyzed

Other hypernyms of morpheme include language unit.

morpheme (noun)	linguistic unit (noun)
minimal meaningful language unit; it cannot be divided into smaller meaningful units	one of the natural units into which linguistic messages can be analyzed