parson vs rector

parson and rector both are nouns.

Word	Noun	Adjective	Verb	Adverb
parson	Yes	No	No	No
rector	Yes	No	No	No

As nouns, parson and rector are synonyms defined as:

Other synonyms of parson include curate, minister, minister of religion, pastor.

parson (noun)	rector (noun)
a person authorized to conduct religious worship	a person authorized to conduct religious worship