Ussually
The word weathers is a form of the verb to weather (weathers, weathering, weathered). The noun weather has no plural form.
Yes, thunderstorms is a noun, a plural, common, concrete noun; a word for a weather condition, a word for a thing.
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 possessive singular noun for meteorologist is meteorologist's, e.g "The meteorologist's forecast for the weather was accurate."The possessive plural noun for meteorologists is meteorologists', e.g. "The meteorologists' predictions for the upcoming season painted a dismal picture of the weather to come."
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.