outward-bound vs outbound

outward-bound and outbound both are adjectives.

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

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

Other synonyms of outward-bound include departing, outward.

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