Architectural style and Romanesque architecture

Architectural style noun - Architecture as a kind of art form.

Romanesque architecture and architectural style are semantically related. In some cases you can replace phrase "Romanesque architecture" with "Architectural style", this phrases are similar.

Romanesque architecture noun - A style of architecture developed in Italy and western Europe between the Roman and the Gothic styles after 1000 AD; characterized by round arches and vaults and by the substitution of piers for columns and profuse ornament and arcades.

Architectural style and Romanesque architecture are semantically related. You can use "Architectural style" instead a noun phrase "Romanesque architecture".