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]
несращениеnoun {n}
nonunion(failure of a broken bone) noun [UK: nɒn.ˈjuː.nɪən] [US: naˈnjuː.njən]