kingpin

As nouns the difference between captain and kingpin

is that captain is a chief or leader while kingpin is the axis around which steered wheels pivot; a bolt that holds the axis in place—a kingbolt.

As a verb captain

is to act as captain.

As nouns the difference between taxonomy and kingpin

is that taxonomy is the science or the technique used to make a classification while kingpin is (motorized vehicles) the axis around which steered wheels pivot; a bolt that holds the axis in place—a kingbolt.

Druglord is a synonym of kingpin.

As nouns the difference between kingpin and druglord

is that kingpin is the axis around which steered wheels pivot; a bolt that holds the axis in place—a kingbolt while druglord is a person who controls a large network of persons involved in an illegal drug trade.