all right vs ok

all right and ok both are adjectives.

Word	Noun	Adjective	Verb	Adverb
all right	No	Yes	No	Yes
ok	No	Yes	No	No

As adjectives, all right and ok are synonyms defined as:

Other synonyms of all right include cool, fine, hunky-dory, o.k., okay.

all right (adjective)	ok (adjective)
being satisfactory or in satisfactory condition	being satisfactory or in satisfactory condition

all right (adverb)	ok (adverb)
an expression of agreement normally occurring at the beginning of a sentence
without doubt (used to reinforce an assertion)
in a satisfactory or adequate manner