Here are some rhymes for rocket:
docket, locket, pocket, brocket (a small deer), crocket (an
architectural ornament of curved foliage used at the edge of a
spire or gable), Crockett, sprocket, socket, pickpocket, skyrocket
and retrorocket.
You could also try online at: http://www.rhymezone.com/,
http://www.rhymer.com/ or
http://www.writeexpress.com/online2.html
Locket socket pocket docket
Locket,socket,pocket i think that's it