I found commonness in my American College Dictionary.
At Webster online:
Pronunciation: 'kä-m&n
Function: adjective
Etymology: Middle English commun, from Old French, from Latin communis -- more at MEAN
Date: 13th century
1 a : of or relating to a community at large : PUBLIC <work for the common good> b : known to the community <common nuisances>
2 a : belonging to or shared by two or more individuals or things or by all members of a group <a common friend> <buried in a common grave> b : belonging equally to two or more mathematical entities <triangles with a common base> c : having two or more branches <common carotid artery>
3 a : occurring or appearing frequently : FAMILIAR <a common sight> b : of the best known kind c : VERNACULAR 2 <common names>
4 a : WIDESPREAD, GENERAL <common knowledge> b : characterized by a lack of privilege or special status <common people> c : just satisfying accustomed criteria : ELEMENTARY <common decency>
5 a : falling below ordinary standards : SECOND-RATE b : lacking refinement : COARSE
6 : denoting nominal relations by a single linguistic form that in a more highly inflected language might be denoted by two or more different forms <common gender> <common case>
7 : of, relating to, or being common stock
- com·mon·ly adverb
- com·mon·ness /-m&n-n&s/ noun