lingering vs holdup

lingering and holdup both are nouns.

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

As nouns, holdup is a hypernym of lingering; that is, holdup is a word with a broader meaning than lingering:

lingering: the act of tarrying
holdup: the act of delaying; inactivity resulting in something being put off until a later time

Other hypernyms of lingering include delay.

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