Menhir and Megalithic structure

Menhir noun - A tall upright megalith; found primarily in England and northern France.

Megalithic structure and menhir are semantically related. In some cases you can use "Megalithic structure" instead a noun "Menhir".

Megalithic structure noun - Memorial consisting of a very large stone forming part of a prehistoric structure (especially in western Europe).

Menhir and megalithic structure are semantically related. Sometimes you can replace term "Menhir" with "Megalithic structure", this terms are similar.