All words except verified are adjectives. The word 'verified' is a verb.
Explanation
The word 'verified' is the past tense of 'verify', which marks an action. Therefore it is a verb.
Verbs are words in English, used to state action or occurrence.
The words unconfirmed, vague, trivial, precise, credible, organized, improbable, significant and random are all characteristics used to define an object, place, person etc. Therefore these words are adjectives.
Adjectives are words use to modify or describe a noun.