undertaker vs mortician

undertaker and mortician both are nouns.

Word	Noun	Adjective	Verb	Adverb
undertaker	Yes	No	No	No
mortician	Yes	No	No	No

As nouns, undertaker and mortician are synonyms defined as:

undertaker and mortician: one whose business is the management of funerals

Other synonyms of undertaker include funeral director, funeral undertaker.

undertaker (noun)	mortician (noun)
one whose business is the management of funerals	one whose business is the management of funerals