You can make up a good word in several ways:
A stupid, made-up word. The same can be said more efficiently with "good."However, good would not make for a very interesting song.
Good spelling! That word came from a song in the kid's movie, 'Mary Poppins', and is completely made up.
I made up the word fish NOW EVERYONE BOW DOWN TO ME :p
neologism
A word made up of two other words is called a compound word.
made up of visible parts
The (Ford) Mondeo has no meaning to it whatsoever. Ford made the word up and it was used as it sounded good and was easy on the tongue
a word i made up
A word that you made up.
a made up word
A made up word.
ME