indignation
You can change the adjective "arrogant" into a noun by adding the suffix "-ce" to form the noun "arrogance."
Add the suffix -ic to the noun atom to form the adjective atomic.
Leisure is already in its adjective form. It does not change between noun and adjective, only between noun/adjective and adverb. "Please complete this at your leisure." = noun "My favorite leisure activity is golf." = adjective "He completed the task leisurely." = adverb
Norway is a proper noun, not an adjective. It is the name of a country. It does not change.
indignation
The noun form for the adjective 'vast' is vastness.
To change the adjective "dark" to a noun, you can use "darkness".
When a proper noun is used as and adjective, it is a proper adjective; for example:Ancient Mexican structures have similarities to ancient Egyptian structures.
The abstract noun for the adjective hard is hardness.
The word 'truthful' is the adjective form of the abstract noun truth.The abstract noun form of the adjective 'truthful' is truthfulness.
The noun form of the adjective enthusiastic is enthusiasm.
No, -ful can be added to a noun to form another noun or an adjective. Examples: spoon (noun) spoonful (noun) hope (noun) hopeful (adjective) Usually, the suffix -ly is added to an adjective to create an adverb. Examples: usual (adjective) usually (adverb) hopeful (adjective) hopefully (adverb)