How to spell ROO correctly?

If you meant "room", please try again. If you meant "roo" as in kangaroo, that spelling is correct.

List of suggestions on how to spell roo correctly

boo I heard someone say "boo" behind me and I quickly turned around.
coo The baby started to coo when it saw the toy.
FOO
goo The slime was thick and gooey, like a pond covered in green goo.
loo
moo The cow let out a loud "moo" as I approached it with a bucket of feed.
POO
rho
rio The Rio Carnival is one of the world's most famous festivals.
rob
rod
roe The salmon roe added a pop of texture to the sushi roll.
rom
ron Ron could not wait to try the new restaurant in town.
rood The rood is a crucifix or a representation of Christ on the cross, usually placed above the chancel arch in a medieval church.
roof I heard the rain tapping on the roof all night.
rook The rook moved diagonally to capture the opponent's pawn.
room
root The root of the problem is unclear at this point.
root`
rot The apple began to rot after being left on the counter for too long.
row A row of trees lined the pathway.
Roy Roy was ecstatic when he won the lottery.
too
woo He tried to woo her with expensive gifts and fancy dinners.
zoo I went to the zoo to see the new baby animals.