throwaway

As nouns the difference between litter and throwaway

is that litter is (countable) a platform mounted on two shafts, or a more elaborate construction, designed to be carried by two (or more) people to transport one (in luxury models sometimes more) third person(s) or (occasionally in the elaborate version) a cargo, such as a religious idol while throwaway is something temporary or disposable.

As a verb litter

is to drop or throw trash without properly disposing of it (as discarding in public areas rather than trash receptacles).

As an adjective throwaway is

disposable; intended for a single use prior to being discarded.