Serendipity
It's such a happy word. It means a happy accident. And I love how it feels on the tongue.

Glossolalia
Another fun to say word but this one has a serious meaning. It is another word for speaking in tongues. Yep, I'm one of those tongue talking people, and no I have never rolled in the floor, I don't foam at the mouth, and the only time I have made animal sounds was when playing with my friends babies. lol

Supercalifragilisticexpialidocious
If you don't know, don't ask.