lower limit vs skeleton

lower limit and skeleton both are nouns.

Word	Noun	Adjective	Verb	Adverb
lower limit	Yes	No	No	No
skeleton	Yes	No	No	No

As nouns, skeleton is a hyponym of lower limit; that is, skeleton is a word with a more specific, narrower meaning than lower limit:

Other hyponyms of lower limit include election threshold.

lower limit (noun)	skeleton (noun)
the limit on the lower (or southernmost) side of something	the internal supporting structure that gives an artifact its shape
the smallest possible quantity	the hard structure (bones and cartilages) that provides a frame for the body of an animal
	a scandal that is kept secret
	something reduced to its minimal form