肥満【ひまん】
corpulence, fatness, obesity
肥料【ひりょう】
manure, fertilizer, fertiliser, compost
肥大【ひだい】
swelling, enlargement, becoming fat, hypertrophy
肥える【こえる】
to grow fat, to gain weight, to put on weight, to grow fertile, to be refined (palate), to be discerning (eye, ear), to become rich, to become successful
肥やす【こやす】
to fertilize, to fertilise, to manure, to enrich
肥やし【こやし】
manure, night soil, dung, fertiliser, fertilizer, something that will help one develop in the future