One word for tears of happiness can be defined by things which make you feel special like your PET, GOING on date with your crush, your enemies doing best they can do for you, a surprise gift by your parents. read more
It might be of two words also, but do not use 'tears of joy' kind of words.. read more
Elation is another word for happiness or joy. Some other words thatyou can use in place of happiness, or joy are blissful, and glad. read more