proselyte

As nouns the difference between taxonomy and proselyte

is that taxonomy is the science or the technique used to make a classification while proselyte is proselyte.

As an adjective proselyte is

proselytic.

As nouns the difference between proselyte and sparkplug

is that proselyte is one who has recently converted to a religion or doctrine, especially a gentile converted to Judaism while sparkplug is alternative form of spark plug.

As a verb proselyte

is to proselytize.