Horehound /(?)/

Hore·hound

Horehound

n.
  1. A plant of the genus Marrubium (Marrubium vulgare), which has a bitter taste, and is a weak tonic, used as a household remedy for colds, coughing, etc. (Bot.)
  2. A lozenge or tablet, usually sweetened, containing extract of horehound, used as a remedy for a cough or a sore throat.

Phrases & Compounds
Fetid horehound
a disagreeable plant resembling horehound (Ballota nigra).
Water horehound
a species of the genus Lycopus, resembling mint, but not aromatic.