We have singled out the W radical as there is just such a large number of signs that are using the three fingers raised to mean W in a sign.
Some not yet illustrated include
Welsh/Wales (three fingers raised apart are drawn down into fist);
Weird (thre fingers apart and sideways near temple move to center of forehead and hook back to tap head).
Wacky (three fiingers up and apart, palm facing ear) are flicked forward.
Womb (thre fingers sideways and apart tap stomach).
Wild (three fingers raised draw a rapid circle in front of shoulder)
World is in this group as it was originally signed using only three fingers but over time evolved to the easier flat hand.