The plural form of suffix is suffixes.

Does a suffix make a word plural?

The most basic rule is to pluralize a noun by adding the suffix -s (as in voters); however, if the noun ends in -s, -x, -z, -sh, or -ch (with the exception—see, we already have an exception—of words ending in -ch pronounced with a hard k, like monarchs and stomachs), the suffix -es is added in order to create an extra ...

Can a suffix change a singular to a plural?

When you want to make a plural out of a singular noun that ends in the sounds [s], [z], [sh], or [ch], you add the suffix -es, and when you make a plural out of a singular noun that ends in a <y> with a consonant letter right in front of it, you change the <y> to <i> and add the suffix -es, but with other singular ...