protactinium vs Pa

protactinium and Pa both are nouns.

Word	Noun	Adjective	Verb	Adverb
protactinium	Yes	No	No	No
Pa	Yes	No	No	No

As nouns, protactinium and Pa are synonyms defined as:

protactinium and Pa: a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

Other synonyms of protactinium include atomic number 91, protoactinium.

protactinium (noun)	Pa (noun)
a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead	a unit of pressure equal to one newton per square meter
	a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead