wild boar vs boar

wild boar and boar both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild boar	Yes	No	No	No
boar	Yes	No	No	No

As nouns, wild boar and boar are synonyms defined as:

wild boar and boar: Old World wild swine having a narrow body and prominent tusks from which most domestic swine come; introduced in United States

Other synonyms of wild boar include Sus scrofa.

wild boar (noun)	boar (noun)
Old World wild swine having a narrow body and prominent tusks from which most domestic swine come; introduced in United States	an uncastrated male hog
	Old World wild swine having a narrow body and prominent tusks from which most domestic swine come; introduced in United States