ADJ

considerable, formidable, huge, massive, sheer
I was amazed by the sheer bulk of the creature
dark, looming, solid

VERB + BULK

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

ADJ

great, large, overwhelming, vast

BULK + NOUN

buying, order, purchasing

PREP

in ~
Sugar is imported in bulk from the mainland

PHRASES

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