blood line vs blood

blood line and blood both are nouns.

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

As nouns, blood line and blood are synonyms defined as:

Other synonyms of blood line include ancestry, bloodline, descent, line, line of descent, lineage, origin, parentage, pedigree, stemma, stock.

blood line (noun)	blood (noun)
the hereditary derivation of an individual	temperament or disposition
	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 line (verb)	blood (verb)
	smear with blood, as in a hunting initiation rite, where the face of a person is smeared with the blood of the kill