Blast rhymes with:
lymphoblast, classed, glassed, last, lymphoblast, aghast, amassed, assed, ast, bast, cast, caste, classed, fast, gassed, gast, glassed, grassed, harassed, hast, kast, lambaste, last, lymphoblast, massed, mast, miscast, nast, passed, past, precast, rast, recast, surpassed, unsurpassed, vast
Blast sounds like:
balked, ballast, belched, bellsouth, belsito, bilked, biologist, blacked, blackest, blackett, blackheath, blackout, blackwood, blasted, blazed, bleached, bleakest, blessed, blest, blight, blighted, blissett, blixt, blockade, blockaded, blocked, blockhead, blowiest, bluest, blushed, blust, bolstad, bulged, bulkhead, bullshit