Blowguns rhymes with:
handguns, outguns, shotguns, anyone's, branson's, everyone's, gentleman's, grandson's, grandsons, handguns, megatons, outguns, overruns, shotguns, someone's
Blowguns sounds like:
balchunas, balconies, balkanize, balkans, balking, belching, belgians, belgium's, bellyaching, bilking, blackening, blackens, blackmun's, blackness, blaesing, blakeney's, blasing, blazing, bleaching, bleakness, blessing, blessings, blocking, blossoming, blossoms, bluejeans, blushing, bolognese, bolognesi, bulging, bullishness