higher rank vs senior status

higher rank and senior status both are nouns.

Word	Noun	Adjective	Verb	Adverb
higher rank	Yes	No	No	No
senior status	Yes	No	No	No

As nouns, higher rank and senior status are synonyms defined as:

higher rank and senior status: higher rank than that of others especially by reason of longer service

Other synonyms of higher rank include higher status, seniority.

higher rank (noun)	senior status (noun)
higher rank than that of others especially by reason of longer service	higher rank than that of others especially by reason of longer service