'Prodigy' vs 'Progeny' What's the Difference Progeny is a word that come into existence due to the process of reproduction. It signifies the perpetuation of lineage and the handover of characteristics from guardian to offspring. This significance of progeny extends beyond biological descendants, encompassing foster children, as well as even ideas that are passed on from one generation to another. Progeny bring the inheritance of their forebears, making them a link among past and upcoming.