tensity vs tonicity

tensity and tonicity both are nouns.

Word	Noun	Adjective	Verb	Adverb
tensity	Yes	No	No	No
tonicity	Yes	No	No	No

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

tensity: the physical condition of being stretched or strained
tonicity: the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli

Other hyponyms of tensity include tone, tonus.

tensity (noun)	tonicity (noun)
the physical condition of being stretched or strained	the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli