immortalise vs eternize

immortalise and eternize both are verbs.

Word	Noun	Adjective	Verb	Adverb
immortalise	No	No	Yes	No
eternize	No	No	Yes	No

As verbs, immortalise and eternize are synonyms defined as:

Other synonyms of immortalise include eternalise, eternalize, eternise, immortalize.

immortalise (verb)	eternize (verb)
make famous forever	make famous forever
be or provide a memorial to a person or an event	cause to continue indefinitely