bacchian

As a noun taxonomy

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

As an adjective bacchian is

(rare) jovial or drunken.

As adjectives the difference between drunken and bacchian

is that drunken is drunk, in the state of intoxication after having drunk an alcoholic beverage while bacchian is (rare) jovial or drunken.

As a verb drunken

is .

As adjectives the difference between jovial and bacchian

is that jovial is (obsolete) pertaining to jove or zeus; jovian while bacchian is (rare) jovial or drunken.