foreign vs external

foreign is not a noun while external is a noun.

Word	Noun	Adjective	Verb	Adverb
foreign	No	Yes	No	No
external	Yes	Yes	No	No

foreign (noun)	external (noun)
	outward features

foreign (adjective)	external (adjective)
relating to or originating in or characteristic of another place or part of the world	happening or arising or located outside or beyond some limits or especially surface
of concern to or concerning the affairs of other nations (other than your own)	coming from the outside
not belonging to that in which it is contained; introduced from an outside source	from or between other countries
not contained in or deriving from the essential nature of something	purely outward or superficial