blood transfusion vs insertion

blood transfusion and insertion both are nouns.

Word	Noun	Adjective	Verb	Adverb
blood transfusion	Yes	No	No	No
insertion	Yes	No	No	No

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

blood transfusion: the introduction of blood or blood plasma into a vein or artery
insertion: the act of putting one thing into another

Other hypernyms of blood transfusion include introduction, intromission.

blood transfusion (noun)	insertion (noun)
the introduction of blood or blood plasma into a vein or artery	the act of putting one thing into another
	a message (spoken or written) that is introduced or inserted