oesophageal reflux vs gastroesophageal reflux

oesophageal reflux and gastroesophageal reflux both are nouns.

Word	Noun	Adjective	Verb	Adverb
oesophageal reflux	Yes	No	No	No
gastroesophageal reflux	Yes	No	No	No

As nouns, oesophageal reflux and gastroesophageal reflux are synonyms defined as:

oesophageal reflux and gastroesophageal reflux: reflux of stomach contents into the esophagus

Other synonyms of oesophageal reflux include esophageal reflux.

oesophageal reflux (noun)	gastroesophageal reflux (noun)
reflux of stomach contents into the esophagus	reflux of stomach contents into the esophagus