Modifiers matching snail:

• large,
• marine,
• herbivorous,
• terrestrial,
• larger,
• small,
• venomous,
• intertidal,
• predatory,
• aquatic,

Simple categories matching venomous:

• invertebrate,
• spider,
• snake,
• animal,
• snail,
• thing,
• critter,
• insect,
• creature,
• pet,
• fish,
• serpent,
• arthropod,
• beast,
• reptile,
• organism,
• scorpion,