Bridegroom
Groom
A groom gets a flower on his lapel and he's finally a real bridegroom! Before that he was just waiting to be one. The flower makes it for real.
はなむこ
The readings for this word are both kun'yomi readings. You learned them when you learned the kanji, so you should be able to read this on your own.
花婿が結婚式場から逃げ出したらしいわよ。
The groom ran away from the wedding!