Oo sound Oo is a digraph sound that is taught as part of the Jolly Phonics scheme. There are two versions of the oo sound; a long sound and a short sound. An example of the long oo sound is spoon, and an example of the short oo sound is book. Examples of oo sound words Long oo sound examples Spoon Moon Food Tooth Hoop Boo Broom Short oo sound examples Book Look Cook Wood Foot | Genius Phonics and Grammar Classes