Others is only used as a pronoun. But 'other' has different grammatical functions. On the other hand, 'others' refers to more than one; while 'other' refers to only one thing.

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 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)

The biggest difference between these two words is that “another” is always singular and does not describe anything specific. “Other” is used for plural and noncount nouns that are general. We only use “the other” to refer to specific nouns.

‘Another’ is used when referring to something that is different or additional to something already mentioned. On the other hand, ‘other’ is used when referring to something different or separate from the one previously mentioned.