Hypertonicity and Tonus

Hypertonicity noun - (of muscular tissue) the state of being hypertonic.

Tonus and hypertonicity are semantically related. In some cases you can use "Tonus" instead a noun "Hypertonicity".

Tonus noun - The elastic tension of living muscles, arteries, etc. that facilitate response to stimuli.

Hypertonicity and tonus are semantically related. Sometimes you can replace term "Hypertonicity" with "Tonus", this nouns are similar.