The noun 'zipper' can be used as the subject of a sentence or a clause, and as the object of a verb or a preposition. Examples:
The zipper is stuck.
The sweater that the zipper snagged was my favorite.
I can't reach this zipper.
The tear is in the seam of the zipper.
The word 'zip' is used as an informal noun as a word for a zipper, for energy, or for zero. The noun forms of the verb to zip are zipper and the gerund, zipping.
Zipper is a noun. The verb is zip. I don't need to zip it up.
A noun is used as the subject of the object of a sentence or phrase.
The one noun in the sentence is bus.
A pronoun (he, she, it, him, her, we, us, etc.) can substitute for a noun in a sentence.
A noun clause and a noun phrase function as nouns in a sentence. A pronoun is a substitute for a noun.
A pronoun takes the place of a noun in a sentence and a gerund, a verbal noun, can be used for all of the functions of a noun as the subject of a sentence or clause and the object of a verb or a preposition.
Motivation is used a noun in the sentence.
Yes it is, because when used in a sentence, it is the subject of the sentence.
it is used as a noun - i am full of awesomeness
It can be used that way in a sentence. No, access is a noun, accessible is an adjective
No, the noun form is regulation.