Nouns

(n)ending, terminationthe end of a word (a suffix or inflectional ending or final morpheme)“I don't like words that have ‘-ism’ as an ending”
(n)termination, ending, conclusionthe act of ending something“the termination of the agreement”
(n)end, endingthe point in time at which something ends“the end of the year”, “the ending of warranty period”
(n)ending, conclusion, finishevent whose occurrence ends something“his death marked the ending of an era”, “when these final episodes are broadcast it will be the finish of the show”
(n)conclusion, end, close, closing, endingthe last section of a communication“in conclusion I want to say …”