strengthen Synonyms

fortify confirm beef up encourage undergird temper tempered support supplement substantiate strengthening thicken tighten truss tripling toughen toughening toughened toning toned tone strengthened stoke stimulate shored shore sharpen revivify revitalize resurrect restrengthen rekindle rejuvenate shoring shote stiffen stiffening steel steadying starch stablish solidify snowball sinew reinvigorate underpin become stronger jack up hike up shore up