Signature rhymes with:
caricature, curvature, expenditure, forfeiture, investiture, literature, musculature, tablature, tabulature, temperature
Signature sounds like:
samatar, sander, sandor, sandra, sandro, sanitary, santer, santeria, santerre, santor, santora, santore, santoro, santry, saundra, saunter, schexnayder, schexnider, schmader, schmetterer, schmieder, schmitter, schneider, schneiter, schnider, schnieder, schnyder, sciandra, secondary, semidry, senator, senatore, sender, sendero, senter, sentra, sentry, shintaro, signatory, sinatra, skenandore, skender, smather, smatter, smither, smoother, smother, snader, sneider, snider, snyder, sondra, sounder, squander, sumatra, summiteer, summitry, sumter, sundar, sunder, sundry, sunter, suntory, swander, symmetry, synder