sad sack vs butcher

sad sack and butcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
sad sack	Yes	No	No	No
butcher	Yes	No	Yes	No

As nouns, sad sack and butcher are synonyms defined as:

sad sack and butcher: someone who makes mistakes because of incompetence

Other synonyms of sad sack include blunderer, botcher, bumbler, bungler, fuckup, fumbler, stumbler.

sad sack (noun)	butcher (noun)
someone who makes mistakes because of incompetence	a person who slaughters or dresses meat for market
	a brutal indiscriminate murderer
	a retailer of meat
	someone who makes mistakes because of incompetence

sad sack (verb)	butcher (verb)
	kill (animals) usually for food consumption