litter vs sedan

litter and sedan both are nouns.

Word	Noun	Adjective	Verb	Adverb
litter	Yes	No	Yes	No
sedan	Yes	No	No	No

As nouns, sedan is a hyponym of litter; that is, sedan is a word with a more specific, narrower meaning than litter:

litter: conveyance consisting of a chair or bed carried on two poles by bearers
sedan: a closed litter for one passenger

Other hyponyms of litter include covered couch, palankeen, palanquin, sedan chair, stretcher.

litter (noun)	sedan (noun)
material used to provide a bed for animals	a car that is closed and that has front and rear seats and two or four doors
conveyance consisting of a chair or bed carried on two poles by bearers	a closed litter for one passenger
the offspring at one birth of a multiparous mammal
rubbish carelessly dropped or left about (especially in public places)

litter (verb)	sedan (verb)
give birth to a litter of animals
make a place messy by strewing garbage around
strew