enemy vs foeman

enemy and foeman both are nouns.

Word	Noun	Adjective	Verb	Adverb
enemy	Yes	No	No	No
foeman	Yes	No	No	No

As nouns, enemy and foeman are synonyms defined as:

enemy and foeman: an armed adversary (especially a member of an opposing military force)

Other synonyms of enemy include foe, opposition.

enemy (noun)	foeman (noun)
an opposing military force	an armed adversary (especially a member of an opposing military force)
any hostile group of people
an armed adversary (especially a member of an opposing military force)
a personal enemy