A common noun, as it (in a general sense) represents an unspecific entity.
The word boyfriend is a singular, common, abstract, compound noun. The 'boy' is concrete, the boy's status as boyfriend is an abstract concept.
The noun 'kind' is an abstract noun. There is no form for kind that is a concrete noun.
The noun 'kind' is a singular, common, abstract noun; a word for a group united by common traits or interests; one that is barely a member of a category (kind of sour), sort of; goods as distinguished from money (payment in kind). A noun is used as the subject of a sentence or a clause, and the object of a verb or a preposition. Examples: I like the kind with the raspberry filling. What kind of creature is an amoeba? He's kind of my boyfriend, I do see him a lot.
Yes, "boyfriend" is a concrete noun because it represents a tangible thing that can be perceived through the physical senses.
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".
common noun
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'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.
Let's begin with the sentence alone, "Maria went with her boyfriend." Maria and boyfriend are both nouns. However, Maria is the subject of the sentence, and went is the verb.
A common noun
The noun "street" is a common noun.