| 1H4 V.iv.24 | [Douglas to King Henry] Another king! They grow like Hydra's heads |
| 2H4 IV.ii.38 | Archbishop to Prince John, of their complaints] with scorn shoved from the court / Whereon this Hydra son of war is born |
| Cor III.i.93 | [Coriolanus to all] Why ... have you thus / Given Hydra here to choose an officer |
| H5 I.i.35 | [Canterbury to Ely] Hydra-headed wilfulness |
| Oth II.iii.295 | [Cassio to Iago] Had I as many mouths as Hydra |