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What is another word for key?

What's another word for key? | Here's a list of synonyms for key.

Definition 1: metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated - [noun denoting artifact]

Definition 1: a lever (as in a keyboard) that actuates a mechanism when depressed - [noun denoting artifact]

Definition 1: mechanical device used to wind another device that is driven by a spring (as a clock) - [noun denoting artifact]

Definition 1: the central building block at the top of an arch or vault - [noun denoting artifact]

Definition 1: pitch of the voice - [noun denoting attribute]

Definition 1: something crucial for explaining - [noun denoting cognition]

Definition 1: any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music - [noun denoting communication]

Definition 1: a generic term for any device whose possession entitles the holder to a means of access - [noun denoting communication]

Definition 1: a list of words or phrases that explain symbols or abbreviations - [noun denoting communication]

Definition 1: a list of answers to a test - [noun denoting communication]

Definition 1: (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court - [noun denoting location]

Definition 1: a coral reef off the southern coast of Florida - [noun denoting object]

Definition 1: United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843) - [noun denoting person]

Definition 1: a winged often one-seed indehiscent fruit as of the ash or elm or maple - [noun denoting plant]

Definition 1: a kilogram of a narcotic drug - [noun denoting quantity]

Definition 1: harmonize with or adjust to - [verb of change]

Definition 1: regulate the musical pitch of - [verb of change]

Definition 1: identify as in botany or biology, for example - [verb of cognition]

Definition 1: vandalize a car by scratching the sides with a key - [verb of contact]

Definition 1: provide with a key - [verb of possession]

Definition 1: serving as an essential component - [adjective satellite denoting all]