hypertonus vs hypertonicity

hypertonus and hypertonicity both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypertonus	Yes	No	No	No
hypertonicity	Yes	No	No	No

As nouns, hypertonus and hypertonicity are synonyms defined as:

hypertonus and hypertonicity: (of muscular tissue) the state of being hypertonic

Other synonyms of hypertonus include hypertonia.

hypertonus (noun)	hypertonicity (noun)
(of muscular tissue) the state of being hypertonic	(of muscular tissue) the state of being hypertonic
	(of a solution) the extent to which a solution has a higher osmotic pressure than some other