bare bones vs sum

bare bones and sum both are nouns.

Word	Noun	Adjective	Verb	Adverb
bare bones	Yes	No	No	No
sum	Yes	No	Yes	No

As nouns, sum is a hypernym of bare bones; that is, sum is a word with a broader meaning than bare bones:

bare bones: (plural) the most basic facts or elements
sum: the choicest or most essential or most vital part of some idea or experience

bare bones (noun)	sum (noun)
(plural) the most basic facts or elements	the whole amount
	the choicest or most essential or most vital part of some idea or experience
	a quantity obtained by the addition of a group of numbers
	the final aggregate
	a set containing all and only the members of two or more given sets
	a quantity of money

bare bones (verb)	sum (verb)
	determine the sum of
	be a summary of