pr
practice, problem, premium
fl
flower, flying, flip-flop
cl
classroom, closet, closer
sw
swallow, sweetheart, sweater
scr
scrambled, scrapbook, scraper
sk
skimming, skinny, skateboard
fr
friendship, frozen, Friday
str
striking, stronger, strengthen
dr
dreaming, drowning, drinking
gr
greenwood, greatness, grateful
cr
cricket, cracker, crazy
sn
snowy, snorkle, sneaker
gl
glory, global, glitter
tr
treatment, transport, traffic
bl
blanket, blinder, bleeding
