Side By Side
Abreast
Synonyms: Alongside (each other), abreast, shoulder to shoulder, together, beside each other, level, cheek by jowl, and close together.
Simultaneously
Synonyms: At the same time, at the same instant/moment, contemporaneously, as a group, at one and the same time, simultaneously, and (all) together.
Example Sentences
They worked side by side on the project.
The two friends walked side by side down the street.
Side by side, the teammates celebrated their victory.
The houses were built side by side along the road.
The children stood side by side for the photo.
The runners crossed the finish line side by side.
The artists painted side by side in the studio.
The soldiers marched side by side in the parade.
The cars parked side by side in the lot.
The partners sat side by side during the meeting.