Learning to read and learning to spell are related processes. From a linguistic perspective, both involve dealing with orthographic conventions of the language, including grapheme-phoneme correspondences that signal semantic differences. Identical pronunciations may be spelled differently to signal critical differences in meaning, as in the homophones raise and raze. Letters that are silent in one word are pronounced in a derivative, as in sign and signal. From a larger cognitive perspective, both reading and spelling also involve differences in word memory due to word length, familiarity, and semantic attributes. For example, the brevity of many common function words relative to their less common content word homophones has been noted: so -sew, in-inn, be-bee, for-fore, by-buy (or bye), or-ore (or oar), and so on. English orthography is graphic and graphophonemic, but it is also morphographemic and morphophonemic, and these distinctions have cognitive consequences for both reading and spelling (