Changing Singular words into Plural words: Do you add "-s" or "-es" to make a word plural?

A singular word is only 1 (one) of something. A plural word has more than 1+ (one) of something. Typically when you want to make a word plural you simply add "-s" to the end of the word. However, if a word ends with: ch, sh, s, x, z then you add "-es" to the end of the word to make it plural.
Ex. (typical words)
paper (singular) (1) 👉🏻 paperS (plural) (1+)
Ex. (ch, sh, s, x, z)
peaCH (singular) (1) 👉🏻 peachES (plural) (1+)