Abreast and Sideways

Abreast adverb - Alongside each other, facing in the same direction.

Sideways and abreast are semantically related in position topic. In some cases you can use "Sideways" instead an adverb "Abreast", when it comes to topics like to one side.

Sideways adverb - With one side faced forward.

Abreast and sideways are semantically related in position topic. Sometimes you can use "Abreast" instead an adverb "Sideways", if it concerns topics such as to one side.