awake / awaken

awake can be a verb or an adjective. It is used to describe a state.
e.g. The baby was sleeping just now. But she is awake (adj) now.
(It means she is not sleepign right now.)

awaken is a verb.
e.g. You are making too much noise. You have awaken the baby.
(The baby is awake because of the noise.)

'awake' can be used as an adjective (opposite to 'asleep') or a verb (to make someone wake up).
'awaken' is the past participle of 'awake'. It can be used as the passive voice.