hiatus vs interruption

hiatus and interruption both are nouns.

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

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

Other hypernyms of hiatus include break.

hiatus (noun)	interruption (noun)
a natural opening or perforation through a bone or a membranous structure	an act of delaying or interrupting the continuity
a missing piece (as a gap in a manuscript)	some abrupt occurrence that interrupts an ongoing activity
an interruption in the intensity or amount of something	a time interval during which there is a temporary cessation of something