externalise vs attribute

externalise is not a noun while attribute is a noun.

Word	Noun	Adjective	Verb	Adverb
externalise	No	No	Yes	No
attribute	Yes	No	Yes	No

As verbs, attribute is a hypernym of externalise; that is, attribute is a word with a broader meaning than externalise:

Other hypernyms of externalise include ascribe, assign, impute.

externalise (noun)	attribute (noun)
	an abstraction belonging to or characteristic of an entity
	a construct whereby objects or individuals can be distinguished

externalise (verb)	attribute (verb)
make external or objective, or give reality to	attribute or credit to
regard as objective	decide as to where something belongs in a scheme