circularize vs alter

circularize and alter both are verbs.

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

As verbs, alter is a hypernym of circularize; that is, alter is a word with a broader meaning than circularize:

Other hypernyms of circularize include change, modify.

circularize (verb)	alter (verb)
make circular	remove the ovaries of
cause to become widely known	become different in some particular way, without permanently losing one's or its former characteristics or essence
distribute circulars to	cause to change; make different; cause a transformation
canvass by distributing letters	insert words into texts, often falsifying it thereby
canvass by using a questionnaire	make an alteration to