helot vs serf

helot and serf both are nouns.

Word	Noun	Adjective	Verb	Adverb
helot	Yes	No	No	No
serf	Yes	No	No	No

As nouns, helot and serf are synonyms defined as:

helot and serf: (Middle Ages) a person who is bound to the land and owned by the feudal lord

Other synonyms of helot include villein.

helot (noun)	serf (noun)
(Middle Ages) a person who is bound to the land and owned by the feudal lord	(Middle Ages) a person who is bound to the land and owned by the feudal lord