power unit vs abwatt

power unit and abwatt both are nouns.

Word	Noun	Adjective	Verb	Adverb
power unit	Yes	No	No	No
abwatt	Yes	No	No	No

As nouns, abwatt is a hyponym of power unit; that is, abwatt is a word with a more specific, narrower meaning than power unit:

power unit: a measure of electric power
abwatt: a power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt (one ten-thousandth of a milliwatt)

Other hyponyms of power unit include milliwatt, W, watt, kilowatt, kW, megawatt, H.P., horsepower, HP, var, volt-ampere, kilovolt-ampere.

power unit (noun)	abwatt (noun)
a measure of electric power	a power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt (one ten-thousandth of a milliwatt)