leniency vs mildness

leniency and mildness both are nouns.

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

As nouns, leniency and mildness are synonyms defined as:

leniency and mildness: mercifulness as a consequence of being lenient or tolerant

Other synonyms of leniency include lenience, lenity.

leniency (noun)	mildness (noun)
lightening a penalty or excusing from a chore by judges or parents or teachers	mercifulness as a consequence of being lenient or tolerant
mercifulness as a consequence of being lenient or tolerant	acting in a manner that is gentle and mild and even-tempered
a disposition to yield to the wishes of someone	good weather with comfortable temperatures