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