1. (p. pr. & vb. n.) of Strengthen.

2. (a.) That strengthens; giving or increasing strength.

accelerando acceleration affirmation aggravation analeptic attestation authentication backing backing up bearing out beefing-up blowing up blowup bolstering bracing buttressing case hardening certification circumstantiation concentration condensation confirmation consolidation corroborant corroboration corroboratory evidence deepening documentation enhancement exacerbation exaggeration explosion fortification hardening heating-up heightening information explosion intensification invigorating invigoration magnification pickup population explosion proof proving proving out ratification redoubling refreshing refreshment reinforcement reinvigoration restorative restrengthening revivification reviving roborant speedup step-up stimulating substantiation support supporting evidence tempering tightening tonic undergirding validation verification