bower
Synonym discussion
Sense: noun/1
For this sense, bower is the most literary and romantic choice. Arbor is the nearest everyday match, usually meaning a garden seat or frame covered with plants. Pergola sounds more architectural and points to the built posts and crossbeams, not the dreamy sheltered feeling. Gazebo names a freestanding roofed garden structure, so it is more solid and formal than a bower. Retreat is broader and can be any quiet place, indoors or outdoors. Use bower when branches or climbing plants create a private, shaded place that feels gentle and enclosed.
Etymology
Bower comes from an Old English word that first meant a room or dwelling. In medieval use it could also name a private chamber. One line of the word later narrowed to the idea of a shaded retreat made by plants or branches. That history explains why the modern word still carries a sense of privacy, shelter, and slightly old-fashioned charm.
First known use
12th century
12th century, in the meaning defined at sense 1 Verb