Nouns

(n)shutting, closingthe act of closing something
(n)conclusion, end, close, closing, endingthe last section of a communication“in conclusion I want to say …”
(n)closing, closureapproaching a particular destination; a coming closer; a narrowing of a gap“the ship's rapid rate of closing gave them little time to avoid a collision”
(n)closure, closedown, closing, shutdowntermination of operations“they regretted the closure of the day care center”

Adjectives

(a)closingfinal or ending“the closing stages of the election”, “the closing weeks of the year”, “the closing scene of the film”, “closing remarks”