picayune vs piffling

picayune and piffling both are adjectives.

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

As adjectives, picayune and piffling are synonyms defined as:

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

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