externalize vs modify

externalize and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
externalize	No	No	Yes	No
modify	No	No	Yes	No

As verbs, modify is a hypernym of externalize; that is, modify is a word with a broader meaning than externalize:

Other hypernyms of externalize include alter, change.

externalize (verb)	modify (verb)
make external or objective, or give reality to	make less severe or harsh or extreme
regard as objective	add a modifier to a constituent
	cause to change; make different; cause a transformation