undertaker

Grimreaper is likely misspelled.

Grimreaper has no English definition.

As a noun undertaker is

a funeral director; someone whose business is to manage funerals, burials and cremations.

As nouns the difference between undertaker and sexton

is that undertaker is a funeral director; someone whose business is to manage funerals, burials and cremations while sexton is a church official who looks after a church building and its graveyard and may act as a gravedigger and bell-ringer.

As a proper noun Sexton is

{{surname|A=An occupational|from=occupations}.