Neupogen rhymes with:
biogen, biogen, bruntjen, energen, nexgen, powergen, synergen, urgen, airmen, biogen, bruntjen, bullpen, businessmen, canadienne, energen, euroyen, flagmen, gunmen, julianne, longden, mahen, mailmen, middlemen, minutemen, nexgen, parisienne, playpen, powergen, repairmen, shenzhen, synergen, tiananmen, turkmen, uniden, urgen, valencienne, weathermen
Neupogen sounds like:
nabozny, napkin, navcom, nivison