Brashness rhymes with:
bearishness, boorishness, bullishness, foolishness, freshness, harshness, jewishness, selfishness, skittishness, sluggishness, squeamishness, waterishness
Brashness sounds like:
barcenas, bargaining, bargains, barging, barking, barsness, bearishness, berzins, boorishness, bracing, brackens, brackins, braganza, bragging, braking, brazenness, breaching, breaking, breakneck, breeching, bresnick, brezinski, brigance, brigham's, brighams, brignac, briseno's, broaching, broking, brookens, brooking, brookings, brookins, browsing, bruising, brushing, brzezinski, burgeoning, burgoyne's, burkina's, burkins, burzynski