What's the difference between housel and ousel?

Housel

Definition:

• (n.) The eucharist.
• (v. t.) To administer the eucharist to.

Example Sentences:

Ousel

Definition:

• (n.) One of several species of European thrushes, especially the blackbird (Merula merula, or Turdus merula), and the mountain or ring ousel (Turdus torquatus).

Example Sentences: