Formant rhymes with:
informant, dormant, informant, norment, self-dormant, storment, arment, clairmont, dearment, debarment, disbarment, dormant, endearment, garment, impairment, informant, norment, procurement, requirement, self-dormant, storment, undergarment
Formant sounds like:
fahrenheit, fairmont, faranda, farmed, farmhand, farrand, farrant, ferment, fermenta, fermented, fernand, fernanda, fernando, ferrand, ferrando, ferrant, ferrante, ferranti, firmed, forand, forehand, forewarned, forint, format, formato, formed, fournet, framed, franta, freehand, freemont, freiermuth, freimuth, freind, fremd, fremiet, fremont, frenette, freund, freyermuth, friend, frond, fronde, front, fronted, frowned