Homophones

aloud - allowed
aunt - aren`t
be - bee
blue - blew
break - brake
buy - by - bye
check - cheque
dear - deer
father - farther
flower - flour
hear - here 
hi - high
I - eye
knew - new
knight - night
know - no
mail -male
meat - meet
one - won
pair - pear
peace - piece
sale - sail
see - sea
sun - son
there - their - they`re
to - two - too
wait - weight
week - weak
witch - which
wood - would
write - right

For more homophones look here