is a specific kind of: consumer.

is a broader term that covers: gulper, guzzler | quaffer | sipper | sucker.

derivation: drink, imbibe.

is a specific kind of: consumer.

is a broader term that covers: bar fly | ale drinker, beer drinker | drunk | drunk, drunkard, inebriate, rummy, sot, wino | guzzler | moderationist | bacchanal, bacchant, drunken reveler, drunken reveller | social drinker, tippler | carouser, wassailer.

is the opposite of: abstainer, abstinent, nondrinker.

derivation: drink, imbibe | booze, drink, fuddle, hit the bottle | drink, tope | absorb, draw, imbibe, soak up, sop up, suck, suck up, take in, take up.