Other contributors have said "Feminine of a bridegroom?" is the same question as "What is the feminine of bridegroom?" If you believe that these are not asking the same thing and should be answered differently, click here
In English, there is no distinction between masculine, feminine and neuter. Noun and verb forms are neutral. Gender is shown by different forms or different words.
The noun for a male is bridegroom; the noun for a female is bride.
A female corresponding to bridegroom is bride. In English, there are no feminine or masculine forms for nouns; English has nouns that are used for a female or a male.
In English, there is no distinction between masculine, feminine and neuter. Verb forms are not determined by gender, verb forms are universal. Gender is shown by different forms or different nouns...