keep one's eyes peeled vs keep one's eyes open

keep one's eyes peeled and keep one's eyes open both are verbs.

Word	Noun	Adjective	Verb	Adverb
keep one's eyes peeled	No	No	Yes	No
keep one's eyes open	No	No	Yes	No

As verbs, keep one's eyes peeled and keep one's eyes open are synonyms defined as:

keep one's eyes peeled and keep one's eyes open: pay attention; be watchful

Other synonyms of keep one's eyes peeled include keep one's eyes skinned.

keep one's eyes peeled (verb)	keep one's eyes open (verb)
pay attention; be watchful	pay attention; be watchful