vagal vs pneumogastric

vagal is not a noun while pneumogastric is a noun.

Word	Noun	Adjective	Verb	Adverb
vagal	No	Yes	No	No
pneumogastric	Yes	Yes	No	No

As adjectives, vagal and pneumogastric are synonyms defined as:

vagal (noun)	pneumogastric (noun)
	a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera

vagal (adjective)	pneumogastric (adjective)
of or relating to the vagus nerve	of or relating to or involving the lungs and stomach
	of or relating to the vagus nerve