According to Merriam Webster, a bridegroom is a man who is just married or about to be married.
In my gay wedding world, I don't just work with brides and grooms. A fair number of people fall somewhere else on the male-female gender spectrum and don't feel 100% either.
There have been several instances in the past year in which I've said something along the lines of, "You're the brides!" And been told by some women (in a very polite way), "I don't feel like a bride." I've heard this from women who are wearing a tux or suit on their wedding day, not a wedding dress or gown, are still female-identified and who do not identify as transgender.
So what are these women called? In my experience, they are comfortable with the term "bridegroom."
Even though I'm a gay wedding planner, I learned from my own experience that I shouldn't assume that all engaged lesbians want to be called brides. Be careful not to make the same assumption yourself and handle this situation by saying something like, "Do you feel comfortable with the term brides? I know some lesbian women prefer to be called bridegrooms."
Gay weddings are redefining the term bridegroom. Take note for your current and future clients.
Are you working with any engaged lesbian women who don't feel like a bride? What do they like to be called?