This is the 7330th most frequent Japanese word.
互換
"互換" means "compatibility" or "interchangeability."
In this sentence, '互換性' refers to the compatibility feature indicating the ability to work jointly between the software versions.
このソフトウェアは古いバージョンとの互換性があります。
This software is compatible with the older version.
Here, '互換可能' implies the interchangeability of parts, showcasing the ability to replace one with another without loss of functionality.
それらの部品は互換可能です。
Those parts are interchangeable.
In this context, '互換性' again denotes compatibility, suggesting investigating whether the machine and the model can work together or be used as alternatives to each other.