This is the 8293rd most frequent Japanese word.
引越し
Moving house; relocation.
Here, 引越し is used as a noun describing the event of relocation that has already occurred.
彼らは引越し後の整理に忙しいです。
They are busy organizing after the move.
In this example, 引越し is used as a verb form, associated with the action of relocating to a new place.
来月、新しいアパートに引越しします。
Next month, I will move to a new apartment.
In this sentence, 引越し is used as a noun referring to the act of moving or relocating to a new residence.