litter vs palankeen

litter and palankeen both are nouns.

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

As nouns, palankeen is a hyponym of litter; that is, palankeen 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
palankeen: a closed litter carried on the shoulders of four bearers

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

litter (noun)	palankeen (noun)
material used to provide a bed for animals	a closed litter carried on the shoulders of four bearers
conveyance consisting of a chair or bed carried on two poles by bearers
the offspring at one birth of a multiparous mammal
rubbish carelessly dropped or left about (especially in public places)

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