line of descent vs lineage

line of descent and lineage both are nouns.

Word	Noun	Adjective	Verb	Adverb
line of descent	Yes	No	No	No
lineage	Yes	No	No	No

As nouns, line of descent and lineage are synonyms defined as:

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

As nouns, line of descent and lineage are synonyms defined as:

line of descent and lineage: the kinship relation between an individual and the individual's progenitors

Other synonyms of line of descent include descent, filiation.

line of descent (noun)	lineage (noun)
the hereditary derivation of an individual	inherited properties shared with others of your bloodline
the kinship relation between an individual and the individual's progenitors	the hereditary derivation of an individual
	a rate of payment for written material that is measured according to the number of lines submitted
	the number of lines in a piece of printed material
	the kinship relation between an individual and the individual's progenitors