behemothian

As an adjective behemothian is

huge; very large.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective behemothian is

huge; very large.

As adjectives the difference between important and behemothian

is that important is important while behemothian is huge; very large.

As adjectives the difference between large and behemothian

is that large is of considerable or relatively great size or extent while behemothian is huge; very large.

As a noun large

is (music|obsolete) an old musical note, equal to two longas, four breves, or eight semibreves.