bubonic

As an adjective bubonic

is of or pertaining to buboes.

As a noun cube is

a regular polyhedron having six identical square faces.

As a verb cube is

to raise to the third power; to determine the result of multiplying by itself twice.

As adjectives the difference between pneumonic and bubonic

is that pneumonic is of, or relating to the lungs; pulmonary while bubonic is bubonic.

As a noun pneumonic

is one who has pneumonia.

As a noun plague

is the bubonic plague, the pestilent disease caused by the virulent bacterium Yersinia pestis.

As a verb plague

is to harass, pester or annoy someone persistently or incessantly.

As an adjective bubonic is

of or pertaining to buboes.

As an adjective bubonic is

bubonic.