shit vs diddly

shit and diddly both are nouns.

Word	Noun	Adjective	Verb	Adverb
shit	Yes	No	Yes	No
diddly	Yes	No	No	No

As nouns, shit and diddly are synonyms defined as:

Other synonyms of shit include diddley, diddly-shit, diddly-squat, diddlyshit, diddlysquat, doodly-squat, jack, squat.

shit (noun)	diddly (noun)
something of little value	a small worthless amount
Obscene word for unacceptable behavior
insulting terms of address for people who are stupid or irritating or ridiculous
a coarse term for defecation
a small worthless amount
obscene terms for feces

shit (verb)	diddly (verb)
have a bowel movement
give away information about somebody