heritage vs accretion

heritage and accretion both are nouns.

Word	Noun	Adjective	Verb	Adverb
heritage	Yes	No	No	No
accretion	Yes	No	No	No

As nouns, accretion is a hyponym of heritage; that is, accretion is a word with a more specific, narrower meaning than heritage:

heritage: that which is inherited; a title or property or estate that passes by law to the heir on the death of the owner
accretion: (law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance)

Other hyponyms of heritage include primogeniture, borough English, bequest, legacy, birthright, patrimony, devise, heirloom.

heritage (noun)	accretion (noun)
hereditary succession to a title or an office or property	(law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance)
any attribute or immaterial possession that is inherited from ancestors	an increase by natural growth or addition
practices that are handed down from the past by tradition	(geology) an increase in land resulting from alluvial deposits or waterborne sediment
that which is inherited; a title or property or estate that passes by law to the heir on the death of the owner	(biology) growth by addition as by the adhesion of parts or particles
	(astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
	something contributing to growth or increase