leap vs bound

leap and bound both are nouns.

Word	Noun	Adjective	Verb	Adverb
leap	Yes	No	Yes	No
bound	Yes	Yes	Yes	No

As nouns, leap and bound are synonyms defined as:

Other synonyms of leap include bounce, leaping, saltation, spring.

As verbs, leap and bound are synonyms defined as:

Other synonyms of leap include jump, spring.

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

leap (noun)	bound (noun)
a light, self-propelled movement upwards or forwards	a light, self-propelled movement upwards or forwards
the distance leaped (or to be leaped)	the greatest possible degree of something
an abrupt transition	the line or plane indicating the limit or extent of something
a sudden and decisive increase	a line determining the limits of an area

leap (adjective)	bound (adjective)
	confined by bonds
	secured with a cover or binding; often used as a combining form
	held with another element, substance or material in chemical or physical union
	confined in the bowels
	headed or intending to head in a certain direction; often used as a combining form as in `college-bound students'
	bound by an oath
	covered or wrapped with a bandage
	bound by contract
	(usually followed by `to') governed by fate

leap (verb)	bound (verb)
pass abruptly from one state or topic to another	place limits on (extent or amount or access)
move forward by leaps and bounds	spring back; spring away from an impact
cause to jump or leap	move forward by leaps and bounds
jump down from an elevated point	form the boundary of; be contiguous to