groundsman vs groundskeeper

groundsman and groundskeeper both are nouns.

Word	Noun	Adjective	Verb	Adverb
groundsman	Yes	No	No	No
groundskeeper	Yes	No	No	No

As nouns, groundsman and groundskeeper are synonyms defined as:

groundsman and groundskeeper: someone who maintains the grounds (of an estate or park or athletic field)

Other synonyms of groundsman include groundkeeper.

groundsman (noun)	groundskeeper (noun)
someone who maintains the grounds (of an estate or park or athletic field)	someone who maintains the grounds (of an estate or park or athletic field)