some other vs another

some other and another both are adjectives.

Word	Noun	Adjective	Verb	Adverb
some other	No	Yes	No	No
another	No	Yes	No	No

As adjectives, some other and another are synonyms defined as:

some other and another: any of various alternatives; some other; entity, singular, other pronoun; quantifier, singular, another

some other (adjective)	another (adjective)
any of various alternatives; some other; entity, singular, other pronoun; quantifier, singular, another	any of various alternatives; some other; entity, singular, other pronoun; quantifier, singular, another