emf vs voltage

emf and voltage both are nouns.

Word	Noun	Adjective	Verb	Adverb
emf	Yes	No	No	No
voltage	Yes	No	No	No

As nouns, emf and voltage are synonyms defined as:

emf and voltage: the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts

Other synonyms of emf include electromotive force.

emf (noun)	voltage (noun)
the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts	the difference in electrical charge between two points in a circuit expressed in volts
	the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts