genetics vs linkage

genetics and linkage both are nouns.

Word	Noun	Adjective	Verb	Adverb
genetics	Yes	No	No	No
linkage	Yes	No	No	No

genetics (noun)	linkage (noun)
the branch of biology that studies heredity and variation in organisms	the act of linking things together
	a mechanical system of rods or springs or pivots that transmits power or motion
	(genetics) traits that tend to be inherited together as a consequence of an association between their genes; all of the genes of a given chromosome are linked (where one goes they all go)
	an associative relation