salutatorian vs salutatory speaker

salutatorian and salutatory speaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
salutatorian	Yes	No	No	No
salutatory speaker	Yes	No	No	No

As nouns, salutatorian and salutatory speaker are synonyms defined as:

salutatorian and salutatory speaker: a graduating student with the second highest academic rank; may deliver the opening address at graduation exercises

salutatorian (noun)	salutatory speaker (noun)
a graduating student with the second highest academic rank; may deliver the opening address at graduation exercises	a graduating student with the second highest academic rank; may deliver the opening address at graduation exercises