Try Googling something with the word "bride" in it, and then something with the word "wives".

If you Google something with "bride" and the results give you something with "wives", and the word "wives" is in BOLD, that indicates that Google sees it the same.

For example, Google "Los Angeles Divorce Lawyer" and you will see that the word "family" is BOLDED in the meta description. It appears that Google considers "Divorce" and "Family" as the same thing, at least when coupled with "lawyer."

With that said, are you Googling "brides" and "wives" with another term, or by themselves?

Lastly, try Keyword Planner Tool or SEMRush.

Ps. I checked in SEMRush, and the words do not appear to be related.