Nouns mention people, places, things or ideas. Most nouns are countable, and come in a singular or plural noun form. By and large, most nouns in English add “es” or “s” to denote a plural. These are called “regular nouns”.
Irregular nouns become plural by some other inflection, or they may simply remain as is. These nouns are harder to learn, but we have the answers to all the common questions on proper noun forms; like, “what’s the plural of sheep?”, “is fish plural or singular?”, “is ox pluraloxes, or oxen?” To all of your questions on plural nouns, we have the answers. Also, no, meese is not the plural of moose; it’s just moose.