Collocations for bulk - noun

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

extra

ease, heave, shift
He heaved his considerable bulk into the chair.

add

great, large, overwhelming, vast

buying, order, purchasing
mail, mailing (both esp. AmE)
bulk mailing rates

email

in bulk
Sugar is imported in bulk from the mainland.
It's usually cheaper to buy in bulk.

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