yeoman of the guard vs beefeater

yeoman of the guard and beefeater both are nouns.

Word	Noun	Adjective	Verb	Adverb
yeoman of the guard	Yes	No	No	No
beefeater	Yes	No	No	No

As nouns, yeoman of the guard and beefeater are synonyms defined as:

yeoman of the guard and beefeater: officer in the (ceremonial) bodyguard of the British monarch

Other synonyms of yeoman of the guard include yeoman.

yeoman of the guard (noun)	beefeater (noun)
officer in the (ceremonial) bodyguard of the British monarch	officer in the (ceremonial) bodyguard of the British monarch