pauper

As a noun pauper

is one who is extremely poor.

As an adjective penurious is

miserly; excessively cheap.

As nouns the difference between pauper and bum

is that pauper is one who is extremely poor while bum is the buttocks.

As a verb bum is

to sodomize; to engage in anal sex.

As an interjection bum is

an expression of annoyance.

As an adjective bum is

of poor quality or highly undesirable.

As nouns the difference between peasant and pauper

is that peasant is a member of the lowly social class which toils on the land, constituted by small farmers and tenants, sharecroppers, farmhands and other laborers on the land where they form the main labor force in agriculture and horticulture while pauper is one who is extremely poor.