potential unit vs volt

potential unit and volt both are nouns.

Word	Noun	Adjective	Verb	Adverb
potential unit	Yes	No	No	No
volt	Yes	No	No	No

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

potential unit: a measure of the potential energy of a unit charge at a given point in a circuit relative to a reference point (ground)
volt: a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt; equivalent to the potential difference across a resistance of 1 ohm when 1 ampere of current flows through it

Other hyponyms of potential unit include abvolt, millivolt, mV, microvolt, nanovolt, picovolt, femtovolt, V, kilovolt, kV.

potential unit (noun)	volt (noun)
a measure of the potential energy of a unit charge at a given point in a circuit relative to a reference point (ground)	a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt; equivalent to the potential difference across a resistance of 1 ohm when 1 ampere of current flows through it