anaesthetist vs anesthesiologist

anaesthetist and anesthesiologist both are nouns.

Word	Noun	Adjective	Verb	Adverb
anaesthetist	Yes	No	No	No
anesthesiologist	Yes	No	No	No

As nouns, anaesthetist and anesthesiologist are synonyms defined as:

anaesthetist and anesthesiologist: a specialist who administers an anesthetic to a patient before he is treated

Other synonyms of anaesthetist include anesthetist.

anaesthetist (noun)	anesthesiologist (noun)
a specialist who administers an anesthetic to a patient before he is treated	a specialist who administers an anesthetic to a patient before he is treated