open-eyed vs wakeful

open-eyed and wakeful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
open-eyed	No	Yes	No	No
wakeful	No	Yes	No	No

As adjectives, open-eyed and wakeful are synonyms defined as:

open-eyed and wakeful: carefully observant or attentive; on the lookout for possible danger

Other synonyms of open-eyed include argus-eyed, vigilant, watchful.

open-eyed (adjective)	wakeful (adjective)
carefully observant or attentive; on the lookout for possible danger	carefully observant or attentive; on the lookout for possible danger
	marked by full consciousness or alertness
	(of sleep) easily disturbed