factor III vs thromboplastin

factor III and thromboplastin both are nouns.

Word	Noun	Adjective	Verb	Adverb
factor III	Yes	No	No	No
thromboplastin	Yes	No	No	No

As nouns, factor III and thromboplastin are synonyms defined as:

factor III and thromboplastin: an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot

Other synonyms of factor III include thrombokinase.

factor III (noun)	thromboplastin (noun)
an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot	an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot