time lag vs interruption

time lag and interruption both are nouns.

Word	Noun	Adjective	Verb	Adverb
time lag	Yes	No	No	No
interruption	Yes	No	No	No

As nouns, interruption is a hypernym of time lag; that is, interruption is a word with a broader meaning than time lag:

time lag: time during which some action is awaited
interruption: a time interval during which there is a temporary cessation of something

Other hypernyms of time lag include break, intermission, pause, suspension.

time lag (noun)	interruption (noun)
time during which some action is awaited	an act of delaying or interrupting the continuity
	some abrupt occurrence that interrupts an ongoing activity
	a time interval during which there is a temporary cessation of something