pig vs ingot

pig and ingot both are nouns.

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

As nouns, ingot is a hypernym of pig; that is, ingot is a word with a broader meaning than pig:

pig (noun)	ingot (noun)
domestic swine	metal that is cast in the shape of a block for convenient handling
a crude block of metal (lead or iron) poured from a smelting furnace
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