anesthesiologist vs anaesthetist

anesthesiologist and anaesthetist both are nouns.

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

As nouns, anesthesiologist and anaesthetist are synonyms defined as:

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

Other synonyms of anesthesiologist include anesthetist.

anesthesiologist (noun)	anaesthetist (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