solidarity vs commonness

solidarity and commonness both are nouns.

Word	Noun	Adjective	Verb	Adverb
solidarity	Yes	No	No	No
commonness	Yes	No	No	No

As nouns, commonness is a hypernym of solidarity; that is, commonness is a word with a broader meaning than solidarity:

solidarity: a union of interests or purposes or sympathies among members of a group
commonness: sharing of common attributes

Other hypernyms of solidarity include commonality.

solidarity (noun)	commonness (noun)
a union of interests or purposes or sympathies among members of a group	ordinariness as a consequence of being frequent and commonplace
	sharing of common attributes
	the quality of lacking taste and refinement
	the state of being that is commonly observed