We don't have synonyms for garden snail yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are garden nail, garden snails and garden snake.
(n) :
Ant of species Cornu aspersum of helicid snails,, commonly found in gardens, originally native to the Mediterranean region, now spread throughout Europe and introduced to the British Isles, the Americas, Australia, New Zealand, and elsewhere.
(n) :
Ant of species Cornu aspersum of helicid snails,, commonly found in gardens, originally native to the Mediterranean region, now spread throughout Europe and introduced to the British Isles, the Americas, Australia, New Zealand, and elsewhere.