do drugs vs free-base

do drugs and free-base both are verbs.

Word	Noun	Adjective	Verb	Adverb
do drugs	No	No	Yes	No
free-base	No	No	Yes	No

As verbs, free-base is a hyponym of do drugs; that is, free-base is a word with a more specific, narrower meaning than do drugs:

Other hyponyms of do drugs include inject, snort, take a hit, base, drop, dope.

do drugs (verb)	free-base (verb)
use recreational drugs	use (purified cocaine) by burning it and inhaling the fumes