outward vs external

outward is not a noun while external is a noun.

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

outward (noun)	external (noun)
	outward features

outward (adjective)	external (adjective)
relating to physical reality rather than with thoughts or the mind	happening or arising or located outside or beyond some limits or especially surface
that is going out or leaving	coming from the outside
	from or between other countries
	purely outward or superficial

outward (adverb)	external (adverb)
toward the outside