cognate vs blood-related

cognate is a noun but blood-related is not a noun.

Word	Noun	Adjective	Verb	Adverb
cognate	Yes	Yes	No	No
blood-related	No	Yes	No	No

As adjectives, cognate and blood-related are synonyms defined as:

Other synonyms of cognate include akin, consanguine, consanguineal, consanguineous, kin.

cognate (noun)	blood-related (noun)
a word is cognate with another if both derive from the same word in an ancestral language
one related by blood or origin; especially on sharing an ancestor with another

cognate (adjective)	blood-related (adjective)
related by blood	related by blood
having the same ancestral language
related in nature