clemency vs pardon

clemency and pardon both are nouns.

Word	Noun	Adjective	Verb	Adverb
clemency	Yes	No	No	No
pardon	Yes	No	Yes	No

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

clemency: leniency and compassion shown toward offenders by a person or agency charged with administering justice
pardon: the formal act of liberating someone

Other hyponyms of clemency include commutation, re-sentencing, amnesty, free pardon, quarter, reprieve, respite.

clemency (noun)	pardon (noun)
leniency and compassion shown toward offenders by a person or agency charged with administering justice	the act of excusing a mistake or offense
good weather with comfortable temperatures	the formal act of liberating someone
	a warrant granting release from punishment for an offense

clemency (verb)	pardon (verb)
	grant a pardon to
	accept an excuse for