Arbor

n.	1.	A kind of latticework formed of, or covered with, vines, branches of trees, or other plants, for shade; a bower.
	1.	(Bot.) A tree, as distinguished from a shrub.
	2.	(Mech.) An axle or spindle of a wheel or opinion.

Noun	1.	arbor - tree (as opposed to shrub)
	2.	arbor - any of various rotating shafts that serve as axes for larger rotating parts Synonyms: mandrel, mandril, spindle
	3.	arbor - a framework that supports climbing plants; "the arbor provided a shady resting place in the park" Synonyms: arbour, bower, pergola

alcove, axis, axle, axle bar, axle shaft, axle spindle, axle-tree, belvedere, bower, casino, conservatory, distaff, fulcrum, gazebo, gimbal, glasshouse, greenhouse, gudgeon, hinge, hingle, hub, kiosk, lathhouse, mandrel, nave, oarlock, pergola, pin, pintle, pivot, pole, radiant, retreat, rowlock, spindle, summerhouse, swivel, trunnion