Firmed rhymes with:
affirmed, confirmed, infirmed, reaffirmed, reconfirmed, unconfirmed, affirmed, confirmed, infirmed, reaffirmed, reconfirmed, termed, unconfirmed
Firmed sounds like:
fahrenheit, fairmont, faranda, farmed, farmhand, farrand, farrant, ferment, fermenta, fermented, fernand, fernanda, fernando, ferrand, ferrando, ferrant, ferrante, ferranti, forand, forehand, forewarned, forint, formant, format, formato, formed, fournet, framed, franta, freehand, freemont, freiermuth, freimuth, freind, fremd, fremiet, fremont, frenette, freund, freyermuth, friend, frond, fronde, front, fronted, frowned