Whizz
Part of speech: verb
Definition: To make a whirring or hissing sound, similar to that of an object speeding through the air.
Part of speech: noun
Definition: A whirring or hissing sound (as above).
Adept
Part of speech: adjective
Definition: Well skilled; completely versed; thoroughly proficient.
Part of speech: noun
Definition: One fully skilled or well versed in anything; a proficient; as, adepts in philosophy.
Example sentence: The bottom line is how do we best provide for the security of the traveling public in light of a determined enemy who is adept at constructing well-designed, well-concealed devices which would not show up in a walk-through metal detector? We're trying to employ the best technology to identify any possible threat.