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.

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. As a determiner, 'other' is used before uncountable and plural countable nouns.

The primary difference between another and other is that both another and other are determiners, but another precedes singular countable nouns or pronouns. Conversely, other precedes a plural countable as well as uncountable nouns and pronouns.

A simple rule to help you remember the difference between another and other is: Another means: Another is a determiner (and a qualifier) that goes before a singular countable noun or a pronoun. Another can be followed by a singular countable noun. He has bought another motorbike.