Not so Good
Repeat after us – Google is our friend. Before posting a ridiculous claim as this OP did, please take a few minutes to look it up online. It won’t take long and it will save you from public humiliation. From the looks of it, the OP thinks “good” is the only word that features “oo.”
They even asked others to prove them wrong. Someone was quick to point out that “book” was one such word and suggested that the OP should perhaps try reading one. It would help for sure. Off the top of our heads, other words include wood, mood, hook, crook, shook, and Google!