Alone and Only

Alone adjective - Being the one or ones of a class with no other members.

Only is a synonym for alone in solely topic. In some cases you can use "Only" instead the word "Alone" as an adjective or an adverb, when it comes to topics like same, separate, unique, exclusively. popular alternative

Only adjective - Having no equal or rival for excellence or desirability.

Alone is a synonym for only in characteristic topic. You can use "Alone" instead the word "Only" as an adverb or an adjective, if it concerns topics such as same, singular, barely, solely. popular alternative