hypotonicity vs hypotonia

hypotonicity and hypotonia both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypotonicity	Yes	No	No	No
hypotonia	Yes	No	No	No

As nouns, hypotonicity and hypotonia are synonyms defined as:

hypotonicity and hypotonia: (of muscular tissue) the state of being hypotonic

Other synonyms of hypotonicity include hypotonus.

hypotonicity (noun)	hypotonia (noun)
(of muscular tissue) the state of being hypotonic	(of muscular tissue) the state of being hypotonic
(of a solution) the extent to which a solution has a lower osmotic pressure than some other