Nickens rhymes with:
chicken's, chickens, chickens', dickens, dickens', hichens, lykins, mickens, pickens, pickens', quickens, ricans, thickens, vicon's, wickens
Nickens sounds like:
nagging, nakanishi, nakasone's, nanchang, nanjing, nanking, nasons, new-mexicans, niceness, nicknames, nissan's, nissans, nixon's, nixons, niznik, non-nonsense, noneconomic, nonsense, nosiness, nosing, nuisance, nuisances, nunsense