Vowel Digraphs OO (boot) Sounds like long "U"

bloom	boot	scoop
boom	loom	shoot
boot	loop	sloop
boost	loose	spoof
booster	loot	spool
brood	mood	spoon
cool	moose	smooth
coop	noon	snooze
doom	noose	stool
drool	pool	stoop
droop	proof	swoop
food	roof	too
fool	room	toot
gloom	roost	tooth
goose	rooster	troop
groom	root	whoop
hoop	school	zoo