apotheosis (en)

the highest point in the development of something; culmination or climax

autopoietic (en)

a system capable of reproducing and maintaining itself

coeval (en)

(adjective) of the same or equal age, antiquity, or duration

declivated (en)

declivated: downward sloping; declivity: downward slope

fissiparous (en)

(adjective) tending to break up into parts; divisive

penumbra (en)

the partially shaded outer region of the shadow cast by an opaque object

valedictory (en)

(adj) serving as a farewell OR (noun) a farewell address