Weakening rhymes with:
awakening, beckoning, blackening, chickening, darkening, dekoning, likening, quickening, reawakening, reckoning, sickening, slackening, thickening, wilkening
Weakening sounds like:
wacksman's, wagging, waging, wagons, waking, washing, wassink, waxing, waxman's, weakens, weakness, weaknesses, weighing, whacking, wheezing, whizzing, wickens, wiggans, wiggins, wishing, wishnick, wisinski, wisneski, wisnewski, wisnieski, wisniewski, wissing, wissink, wojnowski, wozniak, woznick, woznicki, wysong, wyszynski