No, it is a noun. It may be used with another noun as a noun adjunct.
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.
It is an adjective.It is a an adjective.
No, it is an adverb. The adjective is clumsy.
It can be. "Ideal" is an adjective and a noun.
adjective
This cornerstone is broken.
He was the cornerstone of the department. This is the cornerstone of the building
Whas is the use of cornerstone
The cornerstone of sustainment for the army is to be successful in combat.
Cornerstone College was created in 1990.
Cornerstone - agency - was created in 1996.
The population of Cornerstone - agency - is 90.
Cornerstone Research's population is 450.
Cornerstone Research was created in 1989.
Cornerstone Community was created in 1978.
Cornerstone Group was created in 2005.
Cornerstone Festival was created in 1984.