upholder (n.)

• abettor
• admirer
• advocate
• aficionado
• alpenstock
• angel
• apologist
• approver
• arm
• back
• backbone
• backer
• backing
• bandeau
• bearer
• bra
• brace
• bracer
• bracket
• brassiere
• buff
• buttress
• cane
• carrier
• cervix
• champion
• corset
• cosignatory
• cosigner
• crook
• crutch
• defender
• dependence
• endorser
• exponent
• fan
• fulcrum
• girdle
• guarantor
• guard
• guy
• insurer
• jock
• jockstrap
• lover
• mainstay
• maintainer
• mast
• neck
• notary
• paladin
• partisan
• party
• patron
• promoter
• prop
• protagonist
• protector
• ratifier
• reinforcement
• reinforcer
• reliance
• rest
• rigging
• second
• seconder
• sectary
• shoulder
• shroud
• sider
• signatory
• spine
• sponsor
• sprit
• staff
• stalwart
• standby
• stave
• stay
• stick
• stiffener
• strengthener
• subscriber
• support
• supporter
• sustainer
• sympathizer
• underwriter
• vindicator
• votary
• well-wisher