Quahog and Round clam

Quahog noun - Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes.

Round clam is a synonym for quahog. In some cases you can use "Round clam" instead a noun "Quahog".

Round clam noun - Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes.

Quahog is a synonym for round clam. You can use "Quahog" instead a noun phrase "Round clam".