Some things (nouns) that have double letters are: apples arrows attic ball books bottles cabbage cassette cattle coffins cookies deer dolls doors eels eggs fools funnies gorillas granny halls...
hammer, tree, book, letter, message.
Some words using double letters would...
· account · achiever · acoustics · act · action · activity · actor· addition· adjustment· advertisement· advice· aftermath· afternoon· afterthought· agreement· air· airplane·...
zucchini pizza apple squirrel barrette majorette clippers slippers flippers horrible terrible gullible classify lollipop occurred glittery slippery possible porridge carriage marriage corridor...