sky vs lag

sky and lag both are nouns.

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

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

Other hyponyms of sky include submarine, throw back, toss back.

sky (noun)	lag (noun)
the atmosphere and outer space as viewed from the earth	the act of slowing down or falling behind
	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

sky (verb)	lag (verb)
throw or toss with a light motion	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