No, it is a form of the verb to realize. The past participle of the verb, realized, can be used as an adjective.
when a person realizes he or she has a drug problem is when they recover
The correct spelling is "realizes." It is a verb that means becoming aware of something or understanding a situation.
he laughs
Understands Realizes
He's in a lot of pain
when joe realizes what the town is really like he plans to buy more land and become mayor of the town.
When she is all he can think about.
Twigs, realises, realizes
When Squeaky realizes that Raymond can run.
No he doesn't have wings
Ralph stands on his head when he first realizes that they may be all alone with no grown ups on the island.
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.