Posturing rhymes with:
gesturing, butchering, capturing, culturing, featuring, fracturing, gesturing, lecturing, manufacturing, nonmanufacturing, nurturing, picturing, puncturing, recapturing, restructuring, rupturing, structuring, suturing, torturing, venturing
Posturing sounds like:
pasternack, pasternak, pasternak's, pestering, picturing, positrons, posturings