chore vs shitwork

chore and shitwork both are nouns.

Word	Noun	Adjective	Verb	Adverb
chore	Yes	No	No	No
shitwork	Yes	No	No	No

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

chore: a specific piece of work required to be done as a duty or for a specific fee
shitwork: trivial, unrewarding, tedious, dirty, and disagreeable chores

Other hyponyms of chore include ball-breaker, ball-buster, stint, scut work.

chore (noun)	shitwork (noun)
a specific piece of work required to be done as a duty or for a specific fee	trivial, unrewarding, tedious, dirty, and disagreeable chores