unilateral descent vs lineage

unilateral descent and lineage both are nouns.

Word	Noun	Adjective	Verb	Adverb
unilateral descent	Yes	No	No	No
lineage	Yes	No	No	No

As nouns, lineage is a hypernym of unilateral descent; that is, lineage is a word with a broader meaning than unilateral descent:

unilateral descent: line of descent traced through one side of the family
lineage: the kinship relation between an individual and the individual's progenitors

Other hypernyms of unilateral descent include descent, filiation, line of descent.

unilateral descent (noun)	lineage (noun)
line of descent traced through one side of the family	inherited properties shared with others of your bloodline
	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