clam vs knife-handle

clam and knife-handle both are nouns.

Word	Noun	Adjective	Verb	Adverb
clam	Yes	No	Yes	No
knife-handle	Yes	No	No	No

As nouns, knife-handle is a hyponym of clam; that is, knife-handle is a word with a more specific, narrower meaning than clam:

clam: burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness
knife-handle: marine clam having a long narrow curved thin shell

clam (noun)	knife-handle (noun)
burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness	marine clam having a long narrow curved thin shell
flesh of either hard-shell or soft-shell clams
a piece of paper money worth one dollar

clam (verb)	knife-handle (verb)
gather clams, by digging in the sand by the ocean