Tappy.
happy rhymes with nappy
The word "crappy" doesn't exactly match the meaning of mad but can be used to convey someone's mood. Most importantly, it rhymes.
Sorry to disappoint you but there is no other word for happy that rhymes with it.
Something that rhymes with happy bee could be sappy flea.
Nothing rhymes exactly with forget it.
nothing exactly rhymes with smoother
crappy
Darkly kind of rhymes with it, but not exactly. Starkly
happy ways and happy rhyme!
Actually, there is no one word that rhymes exactly with unnecessary.
There are no perfect rhymes for the word nappies.
Happy trail :)