pace vs bit rate

pace and bit rate both are nouns.

Word	Noun	Adjective	Verb	Adverb
pace	Yes	No	Yes	No
bit rate	Yes	No	No	No

As nouns, bit rate is a hyponym of pace; that is, bit rate is a word with a more specific, narrower meaning than pace:

pace: the relative speed of progress or change
bit rate: the number of bits that are conveyed or processed per unit of time.

pace (noun)	bit rate (noun)
a step in walking or running	the number of bits that are conveyed or processed per unit of time.
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