amyotonia vs atonia

amyotonia and atonia both are nouns.

Word	Noun	Adjective	Verb	Adverb
amyotonia	Yes	No	No	No
atonia	Yes	No	No	No

As nouns, amyotonia and atonia are synonyms defined as:

Other synonyms of amyotonia include atonicity, atony.

amyotonia (noun)	atonia (noun)
lack of normal muscular tension or tonus	lack of normal muscular tension or tonus