descent vs bloodline

descent and bloodline both are nouns.

Word	Noun	Adjective	Verb	Adverb
descent	Yes	No	No	No
bloodline	Yes	No	No	No

As nouns, descent and bloodline are synonyms defined as:

descent (noun)	bloodline (noun)
the act of changing your location in a downward direction	ancestry of a purebred animal
properties attributable to your ancestry	the hereditary derivation of an individual
a movement downward
the hereditary derivation of an individual
a downward slope or bend
the kinship relation between an individual and the individual's progenitors