Manure
Fertilizer
noun
ひりょう
肥料 (ひりょう) Manure, Fertilizer
肥満 (ひまん) Obesity
豊満 (ほうまん) Plump, Full-Figured, Voluptuous
Obese 肥 animals create a lot of "material" 料 aka Manure 肥料