Hard clam and Hard-shell clam

Hard clam noun - An edible American clam; the heavy shells were used as money by some American Indians.

Hard-shell clam is a synonym for hard clam. In some cases you can use "Hard-shell clam" instead a noun phrase "Hard clam".

Hard-shell clam noun - An edible American clam; the heavy shells were used as money by some American Indians.

Hard clam is a synonym for hard-shell clam. You can use "Hard clam" instead a noun phrase "Hard-shell clam".