W18, W-18 or W.18 may refer to : * W18 engine, a type of engine * Hansa-Brandenburg W.18, a Hansa-Brandenburg aircraft * 1-(4-Nitrophenylethyl)piperidylidene-2-(4-chlorophenyl)sulfonamide (W-18), a designer drug once thought to be a potent opioid. * W18 Suburban Airport, Laurel Maryland. * , Motorola specification and procedure to sets forth disclosure of materials use for manufacture and delivery of products This disambiguation page lists articles associated with the same title formed as a letter-number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article.