Is there a word to refer to those pairs (or sets) of words that are made up of the same kanji but in the opposite order?


I find such thing very interesting as it is a phenomena that simply does not
exist for languages that do not use kanji or similar writing systems. Is there
a way to call such pairs of words? For example:

> 会社 / 社会
>
> 海外 / 外海
>
> 旅行 / 行旅
>
> 貸借 / 借貸

よろしくお願いします！

