proaccelerin vs clotting factor

proaccelerin and clotting factor both are nouns.

Word	Noun	Adjective	Verb	Adverb
proaccelerin	Yes	No	No	No
clotting factor	Yes	No	No	No

As nouns, clotting factor is a hypernym of proaccelerin; that is, clotting factor is a word with a broader meaning than proaccelerin:

proaccelerin: a coagulation factor
clotting factor: any of the factors in the blood whose actions are essential for blood coagulation

Other hypernyms of proaccelerin include coagulation factor.

proaccelerin (noun)	clotting factor (noun)
a coagulation factor	any of the factors in the blood whose actions are essential for blood coagulation