As a proper noun octopus
is .
As a noun clam is
a bivalve mollusk of many kinds, especially those that are edible; as, the long clam (, a huge east indian bivalve or
clam can be a crash or clangor made by ringing all the bells of a chime at once or
clam can be clamminess; moisture.
As a verb clam is
to dig for clams or
clam can be to produce, in bellringing, a clam or clangor; to cause to clang or
clam can be to be moist or glutinous; to stick; to adhere.