blood coagulation vs clotting

blood coagulation and clotting both are nouns.

Word	Noun	Adjective	Verb	Adverb
blood coagulation	Yes	No	No	No
clotting	Yes	No	No	No

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

blood coagulation: a process in which liquid blood is changed into a semisolid mass (a blood clot)
clotting: the process of forming semisolid lumps in a liquid

Other hypernyms of blood coagulation include coagulation, curdling.

blood coagulation (noun)	clotting (noun)
a process in which liquid blood is changed into a semisolid mass (a blood clot)	the process of forming semisolid lumps in a liquid