diddlysquat vs diddley

diddlysquat and diddley both are nouns.

Word	Noun	Adjective	Verb	Adverb
diddlysquat	Yes	No	No	No
diddley	Yes	No	No	No

As nouns, diddlysquat and diddley are synonyms defined as:

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

diddlysquat (noun)	diddley (noun)
a small worthless amount	a small worthless amount