1. 
[syn: arbor, arbour, bower, pergola]
The Collaborative International Dictionary of English v.0.48:
Pergola \Per"go*la\, n. [It., fr. L. pergula shed, shop, vine
   arbor.]
   Lit., an arbor or bower; specif.: (Italian art) An arbor or
   trellis treated architecturally, as with stone columns or
   similar massive structure.
   [Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):
pergola
    n 1: a framework that supports climbing plants; "the arbor
         provided a shady resting place in the park" [syn: arbor,
         arbour, bower, pergola]
Moby Thesaurus II by Grady Ward, 1.0:
24 Moby Thesaurus words for "pergola":
   alcove, arbor, arcade, areaway, bower, breezeway, cloister,
   colonnade, conservatory, corridor, gallery, gazebo, glasshouse,
   greenhouse, hall, hallway, kiosk, lathhouse, loggia, passage,
   passageway, peristyle, retreat, summerhouse