All the species of Busycotypus/Busycon are known as whelks, with various names like lightning whelk, knobbed whelk, channeled whelk, pear whelk, etc. The larger forms of Buccinidae, like Buccinum, Neptunea, Volutopsius, Ancistrolepis, etc. are also known as whelks. And so are many of the smaller buccinids like Babylonia, Phos, Cominella, Siphonaria, etc. Species of Nucella are commonly known as either dog winkles or dog whelks, and in some places Nassarius are known as dog whelks. I recall seeing a postage stamp (can't remember what country it was from) labeled "corded whelk", and showing what appears to be Cymatium lotorium. I also recall seeing Cabestana spengleri referred to as "Spengler's Whelk". Rapana venosa, which has been accidentally intrroduced to the eastern United States, is referred to, at least by the Fish and Wildlife Service, as "Rapa Whelk". Species of Turbinella are called "whelks" in come locales. And I have seen small knobbed species of Morula referred to as "mulberry whelks". I believe Cittarium pica is called "whelk" in some Caribbean locations, where it is used as food.