capillary action vs capillarity

capillary action and capillarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
capillary action	Yes	No	No	No
capillarity	Yes	No	No	No

As nouns, capillary action and capillarity are synonyms defined as:

capillary action and capillarity: a phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries

capillary action (noun)	capillarity (noun)
a phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries	a phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries