interpolate vs alter

interpolate and alter both are verbs.

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

As verbs, interpolate and alter are synonyms defined as:

interpolate and alter: insert words into texts, often falsifying it thereby

Other synonyms of interpolate include falsify.

interpolate (verb)	alter (verb)
insert words into texts, often falsifying it thereby	remove the ovaries of
estimate the value of something based on known values	become different in some particular way, without permanently losing one's or its former characteristics or essence
	cause to change; make different; cause a transformation
	insert words into texts, often falsifying it thereby
	make an alteration to