holdup vs interruption

holdup and interruption both are nouns.

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

As nouns, interruption is a hyponym of holdup; that is, interruption is a word with a more specific, narrower meaning than holdup:

holdup: the act of delaying; inactivity resulting in something being put off until a later time
interruption: an act of delaying or interrupting the continuity

holdup (noun)	interruption (noun)
robbery at gunpoint	an act of delaying or interrupting the continuity
the act of delaying; inactivity resulting in something being put off until a later time	some abrupt occurrence that interrupts an ongoing activity
	a time interval during which there is a temporary cessation of something