There is no word in English spelled 'azters'.
If you mean 'asters', it is the plural form of the noun 'aster'; a common, concrete noun, a word for a type of flowering plant.
The noun 'kind' is an abstract noun. There is no form for kind that is a concrete noun.
The noun 'kind' is an abstact noun as a word for a type or class. The abstract noun form of the adjective "kind" is "kindness".
It's no kind of noun it is an adjective. The noun is ravenousness.
The the noun 'kind' is an abstract noun as a word for type or class; having similar characteristics.The abstract noun for kind is kindness.
The word 'kind' is both an adjective and a noun. The noun kind, a singular, common, abstract noun is a word for a group of individuals or instances sharing common traits; a category.The noun forms for the adjective kind are kindness and kindliness.
It isn’t a noun at all. Replaces a noun.
A common noun
The noun "street" is a common noun.
She is a noun.
Proper noun
A common noun.
It is an abstract noun.