tolerance vs leniency

tolerance and leniency both are nouns.

Word	Noun	Adjective	Verb	Adverb
tolerance	Yes	No	No	No
leniency	Yes	No	No	No

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

tolerance: the act of tolerating something
leniency: lightening a penalty or excusing from a chore by judges or parents or teachers

Other hyponyms of tolerance include lenience.

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

Other hyponyms of tolerance include acceptance, sufferance, toleration, indulgence, lenience, overtolerance.

tolerance (noun)	leniency (noun)
the act of tolerating something	lightening a penalty or excusing from a chore by judges or parents or teachers
a permissible difference; allowing some freedom to move within limits	mercifulness as a consequence of being lenient or tolerant
the power or capacity of an organism to tolerate unfavorable environmental conditions	a disposition to yield to the wishes of someone
a disposition to allow freedom of choice and behavior
willingness to recognize and respect the beliefs or practices of others