decarbonise vs decarburize

decarbonise and decarburize both are verbs.

Word	Noun	Adjective	Verb	Adverb
decarbonise	No	No	Yes	No
decarburize	No	No	Yes	No

As verbs, decarbonise and decarburize are synonyms defined as:

Other synonyms of decarbonise include decarbonize, decarburise, decoke.

decarbonise (verb)	decarburize (verb)
remove carbon from (an engine)	remove carbon from (an engine)