Alter generally means to change, amend, or revise.
Other synonyms could include:
Adapt, adjust, convert, cook, correct mid-course, develop, dial back, diversify, doctor, fine tune, make different, metamorphose, modify, mutate, phony up, recalibrate, recast, reconstruct, refashion, reform, remodel, renovate, reshape, revamp, shift, transform, transmute, turn, or vary.
change, alter, modify
Change, alter, revise, add on to
Revamp: revise, remodel, change, alter, modify
modified, tailored, alter, become accustomed to, adjust, acclimatize, etc
Amend is another word meaning change is Coins/ Apexs
change
change, alter, modify
Alter
If you mean "convert", how about "change" or "alter".
Alter, Alteration, Affect,
Change, alter, revise, add on to
Alter or modify are but two of many.
review, improve, edit, reexamine, update
close friend, familiar, intimate, crony, alter ego, bosom friend
Revamp: revise, remodel, change, alter, modify
modified, tailored, alter, become accustomed to, adjust, acclimatize, etc
A synonym for modify can be transmogrify, reform, or customize. Also alter, make over, recast, redo, refashion, remake, remodel, revamp, revise, rework, or vary.