bridegroom/'braɪdgrʊm/

n. a man who is getting married or has just got married

n. [C] 新郎：The bride and bridegroom posed for pictures in the park. 新郎新娘在公园里摆造型拍照。

构词bride + groom → groom本身就有“新郎”的意思。前面再加bride，意为“新娘的新郎”。