Nouns

(n)majority, bulkthe property resulting from being or relating to the greater in number of two parts; the main part“the majority of his customers prefer it”, “the bulk of the work is finished”
(n)bulk, mass, volumethe property of something that is great in magnitude“it is cheaper to buy it in bulk”, “he received a mass of correspondence”, “the volume of exports”
(n)bulkthe property possessed by a large mass

Verbs

(v)bulkstick out or up“The parcel bulked in the sack”
(v)bulge, bulkcause to bulge or swell outwards
(v)bulkto gain size and weight by means of exercise and diet