隣同士

next to each other

→ 隣
phrase Rare #37,255
next to each other Describes people or things that are neighbors or side by side.
JA: 私たちは電車で隣同士に座った。
EN: We sat next to each other on the train.

私達は隣同士です。

We are neighbors.

隣同士じゃなおさら

All the more so if they’re next to each other.

— 花様年華 (2000)

トムとメアリーは会議室で隣同士に座っていた。

Tom and Mary were sitting next to each other in the conference room.

私たちは隣同士です。

We’re next-door neighbors.