hypotonus vs hypotonicity

hypotonus and hypotonicity both are nouns.

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

As nouns, hypotonus and hypotonicity are synonyms defined as:

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

Other synonyms of hypotonus include hypotonia.

hypotonus (noun)	hypotonicity (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