opener

n. tool used to open; one who opens

Opener may refer to: Opening batsman in the game of cricketConversation opener or pick-up lineOpener (8mm album)Openers may refer to the plural of 'opener', or to:Two or more playing cards that form the minimum starting hand to start the betting in draw poker
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Noun
1. the first event in a series; "she played Chopin for her opener"; "the season's opener was a game agains the Yankees"
(hypernym) start
(derivation) open
2. a person who unfastens or unwraps or opens; "children are talented undoers of their shoelaces"
(synonym) undoer, unfastener, untier
(hypernym) person, individual, someone, somebody, mortal, human, soul
(derivation) open, open up
3. a hand tool used for opening sealed containers (bottles or cans)
(hypernym) hand tool
(hyponym) bottle opener
(derivation) open, open up

n. opener

(n.)
One who, or that which, opens.