tempo vs pace

tempo and pace both are nouns.

Word	Noun	Adjective	Verb	Adverb
tempo	Yes	No	No	No
pace	Yes	No	Yes	No

As nouns, tempo and pace are synonyms defined as:

tempo (noun)	pace (noun)
the rate of some repeating event	a step in walking or running
(music) the speed at which a composition is to be played	the relative speed of progress or change
	a unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride
	the distance covered by a step
	the rate of moving (especially walking or running)
	the rate of some repeating event