surgical knife vs lance

surgical knife and lance both are nouns.

Word	Noun	Adjective	Verb	Adverb
surgical knife	Yes	No	No	No
lance	Yes	No	Yes	No

As nouns, lance is a hyponym of surgical knife; that is, lance is a word with a more specific, narrower meaning than surgical knife:

surgical knife: a very sharp knife used in surgery
lance: a surgical knife with a pointed double-edged blade; used for punctures and small incisions

Other hyponyms of surgical knife include catling, lancet, scalpel.

surgical knife (noun)	lance (noun)
a very sharp knife used in surgery	a long pointed rod used as a tool or weapon
	an implement with a shaft and barbed point used for catching fish
	a surgical knife with a pointed double-edged blade; used for punctures and small incisions

surgical knife (verb)	lance (verb)
	open by piercing with a lancet
	pierce with a lance, as in a knights' fight
	move quickly, as if by cutting one's way