diddley vs diddly-shit

diddley and diddly-shit both are nouns.

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

As nouns, diddley and diddly-shit are synonyms defined as:

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

diddley (noun)	diddly-shit (noun)
a small worthless amount	a small worthless amount