Both sharp and surprising
Is GR sharp, surprising or both? Why?
anything followed by an "ow" sound when spelled with "ow":
brow, cow, chow, dhow, how, now, prow, vow, wow
anything that is followed by an "oh" sound with "ow":
blow, crow, flow, glow, know, low, mow, show, slow, snow, stow, throw, tow
Some can be either:
bow, row, sow
So GR is
surprising, since "grow" is pronounced with "oh"
Sharp because "ow!" and surprising because "oh!" :)
For each sharp group, if we add 'ow' to the end, it produces a word which is pronounced with an 'ow' sound. On the other hand, adding 'ow' to the end of a surprising group produces a word with an 'o' sound.