Yes, "windows" is a plural noun, referring to multiple window units. The singular form is "window." In different contexts, "Windows" can also refer to the Microsoft operating system, which is treated as a singular proper noun.
The noun carpenter is a singular noun.The plural form is carpenters.
Yes, the word gate is a noun, a singular, common, concrete noun.
Yes the word window is a noun; a singular, common, concrete noun; a word for a thing.
Gallows is a plural noun. It has no singular form.
The singular form of the plural noun 'vertices' is vertex, a word for the highest point; the top or apex.
Yes. Hay is a singular noun. A Singular noun means one item only. So technically, hay is a singular noun.
The noun 'theory' is a singular noun. The plural noun is 'theories'.
The noun 'mice' is the plural form of the singular noun 'mouse'.
Yes the word question is a singular noun. The plural noun is questions.
The noun mailbox is the singular form; the plural is mailboxes.
The noun school is the singular form.The plural noun is schools.
The noun 'fun' is a singular non-count noun, it has no plural form.
Feet is a plural noun. Foot is a singular noun.
The noun juggler is a singular noun. The plural noun is jugglers.
The singular noun is "louse" and the plural noun is "lice."
The noun family is the singular form; the plural form is families.
The noun children is the plural form of the singular noun child.