No, the plural of "hotel" is "hotels".
Yes, the word plural is a noun.
No the word dancing is not a plural noun. When used as a noun the word dancing is uncountable.
No the word notes is a plural noun. The singular noun is note.
It is a plural noun.
The word therefore is an adverb, not a noun, and has no plural. The plural "therefores" would only occur when referring to the word itself, as in "He uses too many therefores in his sentences."
No the word gazing is not a plural noun. The word gazing is not a noun at all but a verb. The singular noun form is gaze and the plural noun is gazes.
Yes, the noun 'mumps' is a plural, uncountable noun, a word for an infectious disease.
Yes the word warriors is a plural noun. The singular noun is warrior.
The plural form for the noun beneficiary is beneficiaries; the plural possessive form is beneficiaries'.
Yes, the plural noun 'guests' is a noun, a word for those invited to visit the home of or take part in an organized function; a word for people.
The noun 'guests' is a common, concrete, plural noun; a word for those invited to visit or attend a function; a word for patrons at a hotel, motel, restaurant, or other venue; a word for a visiting performer, speaker, or contestant; a word for people.
The word army is a singular noun; armies is the plural form.