something used to hold, tighten or support e.g. the walls of a building or the teeth

support

a support build against a wall

brace, support

a placing of the feet; surface for standing on; a (mentioned) relationship (with people)

foundation, basis

the act of establishment (a university, church etc); a strong base of a building, on which it is built

basis for something physical or mental

the structure or system of organization for a business, government, school, society or other group

foundation

a support used to keep something up

support

a support used to keep something up

support

the part of a plant, tree etc in the ground and which takes water and food from the soil

base, core

a metal piece hanging down from a saddle, for a rider's foot; a bone in the ear

support

the act of supporting or being supported; something that supports weight; money etc to live on; to bear the weight of (something); keep (something) in place

something that holds up structure