electron paramagnetic resonance vs ESR

electron paramagnetic resonance and ESR both are nouns.

Word	Noun	Adjective	Verb	Adverb
electron paramagnetic resonance	Yes	No	No	No
ESR	Yes	No	No	No

As nouns, electron paramagnetic resonance and ESR are synonyms defined as:

electron paramagnetic resonance and ESR: microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet

Other synonyms of electron paramagnetic resonance include electron spin resonance.

electron paramagnetic resonance (noun)	ESR (noun)
microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet	microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet
	the rate at which red blood cells settle out in a tube of blood under standardized conditions; a high rate usually indicates the presence of inflammation