Enchanted Learning describes the concept I’m about to explain best: Consonant blends (also called consonant clusters) are groups of two or three consonants in words that makes a distinct consonant sound, such as “bl” or “spl.” Consonant digraphs include bl, br, ch, ck, cl, cr, dr, fl, fr, gh, gl, gr, ng, ph, pl, pr, qu, sc, sh, sk, sl, sm, sn, sp, st, sw, th, tr, tw, wh, wr. When playing Words With Friends (or Srabble) these are the things you look for first. How can your letters combine best to form a good word worth a lot of points. Keeping this in mind turns ‘Hot’ to ‘Shot’, ‘Hone’ to ‘Phone’, and so on. The idea is to get as much bang for your buck, and to do that, you need the ability to extend words a couple of extra letters – ideally to a double or triple word score. Knowing your digraphs, prefixes, and suffixes, are absolutely fundamentally key to that – especially if you’re trying to extend another player’s word.