Sorry to disappoint you but there is no other word for happy that rhymes with it.
The word that is the opposite of happy and rhymes with happy is "unhappy."
There are no perfect rhymes for the word nappies.
There are no perfect rhymes for the word destiny.
There is no such word as "happy-stance." Perhaps you mean "happenstance?"
The word "voracious" rhymes with "vivacious" and means having a strong desire or appetite. An alternative word that means happy or joyful is "delirious."
keep
happy rhymes with nappy
well , i have for some reason searched that a lot . It's true so far soo DEAL WITH IT ! No word known rhymes with happy and also means happy... adore-evermore
The word "crappy" doesn't exactly match the meaning of mad but can be used to convey someone's mood. Most importantly, it rhymes.
Paris
Paris