light time vs distance

light time and distance both are nouns.

Word	Noun	Adjective	Verb	Adverb
light time	Yes	No	No	No
distance	Yes	No	Yes	No

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

light time: distance measured in terms of the speed of light (or radio waves)
distance: size of the gap between two places

Other hypernyms of light time include length.

light time (noun)	distance (noun)
distance measured in terms of the speed of light (or radio waves)	the property created by the space between two objects or points
	size of the gap between two places
	indifference by personal withdrawal
	a distant region
	the interval between two times
	a remote point in time

light time (verb)	distance (verb)
	go far ahead of
	keep at a distance