blood cell vs vegetative cell

blood cell and vegetative cell both are nouns.

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

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

blood cell: either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets
vegetative cell: any of the cells of a plant or animal except the reproductive cells; a cell that does not participate in the production of gametes

Other hypernyms of blood cell include somatic cell.

blood cell (noun)	vegetative cell (noun)
either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets	any of the cells of a plant or animal except the reproductive cells; a cell that does not participate in the production of gametes