The noun form of the adjective 'modest' is modestness.A related noun form is modesty.
The noun form of the adjective close is closeness.
The noun form for the adjective neat is neatness.
The adjective form for the noun 'origin' is original.
The adjective form for the noun system is systematic.
One possibility is finality.
The noun form for the adjective authentic is authenticity.
The noun form of the adjective 'dangerous' is dangerousness.The word 'dangerous' is the adjective form of the noun danger.The noun form of the adjective 'childish' is childishness.The word 'childish' is the adjective form of the noun child.The noun form of the adjective 'beautiful' is beautifulness.The word 'beautiful' is the adjective form of the noun beauty.
The noun form of the adjective 'wide' is wideness.A related noun form is width.
The noun form of the adjective 'comfortable' is comfortableness.The word 'comfortable' is the adjective form of the noun comfort.
The abstract noun form of the adjective unique is uniqueness.
The noun form of the adjective 'modest' is modestness.A related noun form is modesty.
The noun form for the adjective hilarious is hilariousness. A related noun form is hilarity.
The abstract noun form for the adjective convenient is convenience.
The noun form of the adjective 'considerate' is considerateness or consideration.
The adjective form for the noun nation is national.
The noun form of the adjective close is closeness.