kilowatt hour vs B.T.U.

kilowatt hour and B.T.U. both are nouns.

Word	Noun	Adjective	Verb	Adverb
kilowatt hour	Yes	No	No	No
B.T.U.	Yes	No	No	No

As nouns, kilowatt hour and B.T.U. are synonyms defined as:

kilowatt hour and B.T.U.: a unit of energy equal to the work done by a power of 1000 watts operating for one hour

Other synonyms of kilowatt hour include Board of Trade unit, kW-hr.

kilowatt hour (noun)	B.T.U. (noun)
a unit of energy equal to the work done by a power of 1000 watts operating for one hour	a unit of energy equal to the work done by a power of 1000 watts operating for one hour