nouns
a device that requires skill for proper use
is a type of (narrower)
an instrumentality invented for a particular purpose
"the device is small enough to wear on your wrist"; "a device intended to conserve water"
the means whereby some act is accomplished
"my greed was the instrument of my destruction"; "science has given us new tools to fight disease"
a person used by another to gain an end
(law) a document that states some contractual relationship or grants some right
the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process
any of various devices or contrivances that can be used to produce musical tones or sounds