leap vs quantum leap

leap and quantum leap both are nouns.

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

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

Other hyponyms of leap include quantum jump.

leap (noun)	quantum leap (noun)
a light, self-propelled movement upwards or forwards	a sudden large increase or advance
the distance leaped (or to be leaped)
an abrupt transition
a sudden and decisive increase

leap (verb)	quantum leap (verb)
pass abruptly from one state or topic to another
move forward by leaps and bounds
cause to jump or leap
jump down from an elevated point