From Wiktionary, the free dictionary
From stair + tower.
stairtower (plural stairtowers)
- A tower with stairs on the inside.
The castle had four stairtowers when it was built, but only two remain.
2001, Flavia Alaya, Under the Rose: A Confession, page 114:We faced each other from opposite walls of the well-rubbed stairtower poised in an unblinking lovesickly gaze.
