case knife vs table knife

case knife and table knife both are nouns.

Word	Noun	Adjective	Verb	Adverb
case knife	Yes	No	No	No
table knife	Yes	No	No	No

As nouns, table knife is a hypernym of case knife; that is, table knife is a word with a broader meaning than case knife:

case knife (noun)	table knife (noun)
a knife with a fixed blade that is carried in a sheath	a knife used for eating at dining table
a metal blade with a handle; used as cutlery