procurator vs placeholder

procurator and placeholder both are nouns.

Word	Noun	Adjective	Verb	Adverb
procurator	Yes	No	No	No
placeholder	Yes	No	No	No

As nouns, procurator and placeholder are synonyms defined as:

Other synonyms of procurator include proxy.

procurator (noun)	placeholder (noun)
(ancient Rome) someone employed by the Roman Emperor to manage finance and taxes	a symbol in a logical or mathematical expression that can be replaced by the name of any member of specified set
a person authorized to act for another	a person authorized to act for another