Mind your pronunciation of these two words as mispronouncing them changes the meaning
Letter /ˈlɛtə/
- a character representing one or more of the sounds used in speech; any of the symbols of an alphabet;
- a written, typed, or printed communication, sent in an envelope by post or messenger.
Litter /ˈlɪtə/
rubbish such as paper, cans, and bottles left lying in an open or public place.