mass
(n) : the Eucharist, now especially in Roman Catholicism; celebration of the Eucharist
"sir I. Newton — If it were not for these principles, the bodies of the earth, planets, comets, sun, and all things in them, would grow cold and freeze, and become inactive masses"
(v) : to celebrate mass; to form or collect into a mass; to form into a collective body; to bring together into masses; to assemble
"Coleridge — But mass them together and they are terrible indeed."