wellhouse

From well +‎ house.

• (General American) IPA^(key): /ˈwɛlˌhaʊs/

wellhouse (plural wellhouses)

1. A small building that houses a well.
   • 1927 March 5, Arthur Conan Doyle, “The Adventure of Shoscombe Old Place”, in The Case Book of Sherlock Holmes, New York, N.Y.: A[lbert] L[evi] Burt Company, published June 1927, →OCLC, page 284:

     "When did Sir Robert give away his sister's dog?" / "It was just a week ago to-day. The creature was howling outside the old well-house, and Sir Robert was in one of his tantrums that morning. […]"

• well-house