Other, the other, another are pronouns when they are replacing a noun. They can be singular or plural. ‘Others’ vs. ‘the others’ Both are pronouns, that is, they stand for a noun. ‘Others’ is more vague, we are not determining how many others, or which other ones. ‘The others’ is more specific; it stands for all the rest.

A simple rule to help you remember the difference between another and other is: another + singular noun other + plural noun others (a pronoun to replace other + plural noun) I need another cup. (cup is singular so we use another) I need other cups. (cups is plural so we use other) I need others. (refers to other cups)

As a determiner, 'other' is used before nouns. As a pronoun, 'other' is used without any nouns immediately following it, and it is used before verbs. The point is that we can use 'others' as a plural pronoun. 'Other' can be used as an adjective, after determiners, after verbs, and before nouns.