Just one of the English language’s many many inconsistencies, caused by the fact that it has assimilated words from so many different languages during its development.

Why?

The reason is because the spelling has nothing to do with it, as long as the main ending part has an exact sound. It’s just that usually, the spelling might be the same like ‘kind’ and ‘mind’. But rhyme just means a word agreeing with another in terminal sound, not a word agreeing with another in terminal spelling.

A ‘rhyme’ is a similar sound in another word.

It doesn’t have to be spelled anywhere near like the word it’s intended to ‘rhyme’ with !!

This is probably a ‘straight’ answer to a purposely stupid Q.