lag vs interregnum

lag and interregnum both are nouns.

Word	Noun	Adjective	Verb	Adverb
lag	Yes	No	Yes	No
interregnum	Yes	No	No	No

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

lag (noun)	interregnum (noun)
the act of slowing down or falling behind	the time between two reigns, governments, etc.
one of several thin slats of wood forming the sides of a barrel or bucket
the time between one event, process, or period and another

lag (verb)	interregnum (verb)
throw or pitch at a mark, as with coins
cover with lagging to prevent heat loss
hang (back) or fall (behind) in movement, progress, development, etc.
lock up or confine, in or as in a jail