salire, ascoltare, sentire udire are infinitive forms of To go up, to listen, to hear. Alzarsi e svegliarsi are : stand up and wake up. They are a sort of reflexive forms: it is as you say: I wake up by myself or I stand up by myself... (yourself, ourselves and so on..)

alzarsi: to get up svegliarsi: to awake salire: to rise, to go up, to climb udire: to hear sentire: to feel, to hear ascoltare: to listen