accretion [accretions](concretion; coherence of separate particles; as, the accretion of particles so as to form a solid mass) noun [UK: ə.ˈkriːʃ.n̩] [US: ə.ˈkriːʃ.n̩]
cohesion [cohesions](the growing together of normally distinct parts of a plant) noun [UK: kəʊ.ˈhiːʒ.n̩] [US: koʊ.ˈhiːʒ.n̩]