serjeant-at-law vs serjeant

serjeant-at-law and serjeant both are nouns.

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

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

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

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