Dragnet rhymes with:
allnet, arpanet, avnet, bayonet, bissonnette, cellnet, driftnet, ethernet, filenet, imnet, instinet, internet, investnet, massenet, raynet, robinette, rudnet, sassnet, selectnet, seniornet, spacenet, telenet, tymnet, usenet
Dragnet sounds like:
darkened, detergent, dragonhead