Here's what rhymes with overpopulated.

Consider these alternatives

underpopulated / overpopulated overcrowded / doubted underdeveloped / developed glutted / budget benighted / decided denuded / deluded teeming / meaning depopulated / unpopulated gentrified / side archipelagic / democratic destitute / food underserved / first underfed / said squalid / knowledge unpopulated / depopulated vegetated / stated ghettos / meadows overgrazed / based