stickup vs holdup

stickup and holdup both are nouns.

Word	Noun	Adjective	Verb	Adverb
stickup	Yes	No	No	No
holdup	Yes	No	No	No

As nouns, stickup and holdup are synonyms defined as:

Other synonyms of stickup include armed robbery, heist.

stickup (noun)	holdup (noun)
robbery at gunpoint	robbery at gunpoint
	the act of delaying; inactivity resulting in something being put off until a later time