accede

As a noun taxonomy

is the science or the technique used to make a classification.

As a verb accede is

to approach; to arrive, to come forward.

As a noun accretion

is the act of increasing by natural growth; especially the increase of organic bodies by the internal accession of parts; organic growth.

As a verb accede is

to approach; to arrive, to come forward.

As verbs the difference between accede and advene

is that accede is while advene is (rare) to accede or to come to; to be superadded to, to be added to something or become a part of it, though inessential.