picayune vs piddling

picayune and piddling both are adjectives.

Word	Noun	Adjective	Verb	Adverb
picayune	No	Yes	No	No
piddling	No	Yes	No	No

As adjectives, picayune and piddling are synonyms defined as:

Other synonyms of picayune include fiddling, footling, lilliputian, little, niggling, petty, piffling, trivial.

picayune (adjective)	piddling (adjective)
(informal) small and of little importance	(informal) small and of little importance