diddly-shit vs diddlysquat

diddly-shit and diddlysquat both are nouns.

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

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

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

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