alter vs falsify

alter and falsify both are verbs.

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

As verbs, alter and falsify are synonyms defined as:

Other synonyms of alter include interpolate.

alter (verb)	falsify (verb)
remove the ovaries of	falsify knowingly
become different in some particular way, without permanently losing one's or its former characteristics or essence	insert words into texts, often falsifying it thereby
cause to change; make different; cause a transformation	prove false
insert words into texts, often falsifying it thereby	make false by mutilation or addition; as of a message or story
make an alteration to	tamper, with the purpose of deception