WordNet sense 1 (a coming to an end of a contract period):

expiration, expiry

WordNet sense 2 (a place where something ends or is complete):

endpoint, terminus, end point

WordNet sense 3 (something that results):

result, resultant, outcome, final result

WordNet sense 4 (the end of a word (a suffix or inflectional ending or final morpheme)):

ending

WordNet sense 5 (the act of ending something):

conclusion