assign vs externalize

assign and externalize both are verbs.

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

As verbs, externalize is a hyponym of assign; that is, externalize is a word with a more specific, narrower meaning than assign:

assign (verb)	externalize (verb)
select something or someone for a specific purpose	make external or objective, or give reality to
attribute or credit to	regard as objective
decide as to where something belongs in a scheme
attribute or give
transfer one's right to
give out
make undue claims to having
give an assignment to (a person) to a post, or assign a task to (a person)