We don't have synonyms for whelks yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are whelk, whelky and whelps.
(n) :
Certain edible sea snails, especially, any one of numerous species of large marine gastropods belonging to Buccinidae, much used as food in Europe.
(n) :
Certain edible sea snails, especially, any one of numerous species of large marine gastropods belonging to Buccinidae, much used as food in Europe.