reinforce Synonyms

bolster strengthen buttress encourage fortify reward augment underpin reenforce heighten corroborate supplement build up support harden sustain emphasize increase intensify expand toughen consolidate confirm brace shore up prop up enhance undergird stiffening steel steadying tripling underline underbrace solidify stake starch substantiate toughened subventionize stress strengthening teach strengthened stimulate supercharge stiffen thicken tighten toughening