agglomeration [agglomerations](act of collecting in a mass) noun [UK: ə.ˌɡlɒ.mə.ˈreɪʃ.n̩] [US: ə.ˌɡlɑː.mə.ˈreɪʃ.n̩]
sintering(A process in which the particles of a powder are welded together by pressure and heating to a temperature below its melting point) noun [UK: sˈɪntərɪŋ] [US: sˈɪntɚrɪŋ]