interval vs absence

interval and absence both are nouns.

Word	Noun	Adjective	Verb	Adverb
interval	Yes	No	No	No
absence	Yes	No	No	No

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

interval (noun)	absence (noun)
the distance between things	failure to be present
a set containing all points (or all real numbers) between two given endpoints	the state of being absent
the difference in pitch between two notes	the occurrence of an abrupt, transient loss or impairment of consciousness (which is not subsequently remembered), sometimes with light twitching, fluttering eyelids, etc.; common in petit mal epilepsy
a definite length of time marked off by two instants	the time interval during which something or somebody is away