As an adjective bulkier
is comparative of bulky.
As a noun bulker is
a bulk dry goods cargo ship.
bulkier
English
Adjective
(head)
(bulky)
bulky
English
Adjective
(er)
Being large in size, mass, or volume.
Unwieldy
(bodybuilding) Having excess body mass, especially muscle.
bulker
English
Noun
(
en noun)
(nautical) A bulk dry goods cargo ship.
(nautical) A person employed to ascertain the bulk or size of goods, in order to fix the amount of freight or dues payable on them.
See also
* tanker
* container ship
* cargo ship
* freighter