Examples of abstract/concrete noun combinations are:
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The abstract noun form of the concrete noun 'thief' is thievery.The abstract noun form of the concrete noun 'infant' is infancy.The abstract noun form of the concrete noun 'coward' is cowardice.The abstract noun form of the adjective 'urgent' is urgency.
The abstract noun form of the concrete noun 'patriot' is patriotism.
The noun 'kind' is an abstract noun. There is no form for kind that is a concrete noun.
The noun allowance can be a concrete or an abstract noun, depending on use:Allowance is an abstract noun as a word for something permitted or an amount paid.Allowance is a concrete noun as a word for a measurement, such as fabric for a seam allowance.
No, cafeteria is a concrete noun.