piddle away vs trifle

piddle away is not a noun while trifle is a noun.

Word	Noun	Adjective	Verb	Adverb
piddle away	No	No	Yes	No
trifle	Yes	No	Yes	No

As verbs, piddle away and trifle are synonyms defined as:

piddle away and trifle: waste time; spend one's time idly or inefficiently

Other synonyms of piddle away include piddle, wanton, wanton away.

piddle away (noun)	trifle (noun)
	something of small importance
	a detail that is considered insignificant
	a cold pudding made of layers of sponge cake spread with fruit or jelly; may be decorated with nuts, cream, or chocolate

piddle away (verb)	trifle (verb)
waste time; spend one's time idly or inefficiently	consider not very seriously
	act frivolously
	waste time; spend one's time idly or inefficiently