atrophy vs amyotrophy

atrophy and amyotrophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
atrophy	Yes	No	Yes	No
amyotrophy	Yes	No	No	No

As nouns, amyotrophy is a hyponym of atrophy; that is, amyotrophy is a word with a more specific, narrower meaning than atrophy:

Other hyponyms of atrophy include amyotrophia, tabes, kraurosis.

atrophy (noun)	amyotrophy (noun)
any weakening or degeneration (especially through lack of use)	progressive wasting of muscle tissues
a decrease in size of an organ caused by disease or disuse

atrophy (verb)	amyotrophy (verb)
undergo atrophy