Collocations for bulk - noun

considerable, formidable, huge, massive, sheer
I was amazed by the sheer bulk of the creature.

dark, looming, solid

ease, heave, shift (used about people)
He heaved his considerable bulk into the chair.

great, large, overwhelming, vast

buying, order, purchasing

in ~
Sugar is imported in bulk from the mainland.

the bulk of
(= most of) The great bulk of the work has now been done.

buy in bulk
It''s usually cheaper to buy in bulk.