blood vs blood cell

blood and blood cell both are nouns.

Word	Noun	Adjective	Verb	Adverb
blood	Yes	No	Yes	No
blood cell	Yes	No	No	No

blood (noun)	blood cell (noun)
temperament or disposition	either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets
the fluid (red in vertebrates) that is pumped through the body by the heart and contains plasma, blood cells, and platelets
the hereditary derivation of an individual
people viewed as members of a group
a dissolute man in fashionable society

blood (verb)	blood cell (verb)
smear with blood, as in a hunting initiation rite, where the face of a person is smeared with the blood of the kill