sergeant-at-law vs serjeant

sergeant-at-law and serjeant both are nouns.

Word	Noun	Adjective	Verb	Adverb
sergeant-at-law	Yes	No	No	No
serjeant	Yes	No	No	No

As nouns, sergeant-at-law and serjeant are synonyms defined as:

Other synonyms of sergeant-at-law include sergeant, serjeant-at-law.

sergeant-at-law (noun)	serjeant (noun)
an English barrister of the highest rank	an English barrister of the highest rank