delay vs dilly-dally

delay is a noun but dilly-dally is not a noun.

Word	Noun	Adjective	Verb	Adverb
delay	Yes	No	Yes	No
dilly-dally	No	No	Yes	No

As verbs, dilly-dally is a hyponym of delay; that is, dilly-dally is a word with a more specific, narrower meaning than delay:

delay (noun)	dilly-dally (noun)
the act of delaying; inactivity resulting in something being put off until a later time
time during which some action is awaited

delay (verb)	dilly-dally (verb)
cause to be slowed down or delayed	postpone doing what one should be doing
stop or halt
slow the growth or development of
act later than planned, scheduled, or required