yeoman of the guard vs yeoman

yeoman of the guard and yeoman both are nouns.

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

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

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

Other synonyms of yeoman of the guard include beefeater.

yeoman of the guard (noun)	yeoman (noun)
officer in the (ceremonial) bodyguard of the British monarch	in former times was free and cultivated his own land
	officer in the (ceremonial) bodyguard of the British monarch