Synonyms for Expectation (same or very similar meaning)
WordNet sense 1 (wishing with confidence of fulfillment):
anticipationWordNet sense 2 (the sum of the values of a random variable divided by the number of values):
arithmetic mean, expected value, first momentWordNet sense 3 (belief about (or mental picture of) the future):
outlook, prospect, prospectFrom the ODE community, based on WordNetadd/edit