Board Thread:Warhammer 40k General Discussion/@comment-6589306-20130228113457/@comment-24459347-20150107054311

Orks: the Orks won the Octarian war. But that had made the Tyranids more powerful.

Necrons: Pretty much will beat them.

Tau: Tyranids adapted against their weaponry.

Necrons are pretty much the only race to beat the Tyranids due to their lack of biomass and Necrons are indestructible.