pig vs slattern

pig and slattern both are nouns.

Word	Noun	Adjective	Verb	Adverb
pig	Yes	No	Yes	No
slattern	Yes	No	No	No

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

Other hyponyms of pig include litter lout, litterbug, litterer, slovenly woman, slut, trollop.

pig (noun)	slattern (noun)
domestic swine	a dirty untidy woman
a crude block of metal (lead or iron) poured from a smelting furnace	a prostitute who attracts customers by walking the streets
mold consisting of a bed of sand in which pig iron is cast
a person regarded as greedy and pig-like
uncomplimentary terms for a policeman
a coarse obnoxious person