dilly-dallier vs dillydallier

dilly-dallier and dillydallier both are nouns.

Word	Noun	Adjective	Verb	Adverb
dilly-dallier	Yes	No	No	No
dillydallier	Yes	No	No	No

As nouns, dilly-dallier and dillydallier are synonyms defined as:

Other synonyms of dilly-dallier include dallier, lounger, mope.

dilly-dallier (noun)	dillydallier (noun)
someone who wastes time	someone who wastes time