lousiness vs crabs

lousiness and crabs both are nouns.

Word	Noun	Adjective	Verb	Adverb
lousiness	Yes	No	No	No
crabs	Yes	No	No	No

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

lousiness: infestation with lice (Pediculus humanus) resulting in severe itching
crabs: infestation of the pubic hair by crab lice

Other hyponyms of lousiness include head lice, pediculosis capitis, pediculosis corporis, pediculosis pubis.

lousiness (noun)	crabs (noun)
the quality of being disgusting to the senses or emotions	infestation of the pubic hair by crab lice
infestation with lice (Pediculus humanus) resulting in severe itching