It is neither: it is a noun.
"No" is usually an interjection or an adjective, but never a verb!
Coincide is a verb. Coincidental is the adjective.
Surge is a noun (a surge) and a verb (to surge). It is not an adjective.
Verb
Certain is an adjective.
Scandal in adjective form is scandalous. It was a scandalous affair.
No, it is not.
The verb for scandal is "to scandalize."
scandalous
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.
Adjective.
peeked a adjective or verb
No, it is an adjective. Breathe is a verb, breathing is a verb too... but then breathable is an adjective, which makes unbreathable an adjective.
It's an adjective.
Verb: to fascinate Adjective: fascinating
verb of brave?
Restless is an adjective. Restless is not a verb.