Webster's Revised Unabridged Dictionary · 1913

Amass

Amass ({not transcribed}) , transitive verb

[French ambusher, Late Latin amassare; Latin ad + massa lump, mass. See Mass.]

To collect into a mass or heap; to gather a great quantity of; to accumulate; as, to amass a treasure or a fortune; to amass words or phrases.
The life of Homer has been written by amassing all the traditions and hints the writers could meet with. — Pope

Amass , noun

[Old French amasse, from ambusher.]

A mass; a heap. [Obsolete] — Sir H. Wotton