falsify vs mangle

falsify is not a noun while mangle is a noun.

Word	Noun	Adjective	Verb	Adverb
falsify	No	No	Yes	No
mangle	Yes	No	Yes	No

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

Other hyponyms of falsify include murder, mutilate.

falsify (noun)	mangle (noun)
	clothes dryer for drying and ironing laundry by passing it between two heavy heated rollers

falsify (verb)	mangle (verb)
falsify knowingly	damage or injure severely
insert words into texts, often falsifying it thereby	alter so as to make unrecognizable
prove false	press with a mangle
make false by mutilation or addition; as of a message or story	injure badly by beating
tamper, with the purpose of deception