outbound vs outward-bound

outbound and outward-bound both are adjectives.

Word	Noun	Adjective	Verb	Adverb
outbound	No	Yes	No	No
outward-bound	No	Yes	No	No

As adjectives, outbound and outward-bound are synonyms defined as:

Other synonyms of outbound include departing, outward.

outbound (adjective)	outward-bound (adjective)
that is going out or leaving	that is going out or leaving