Halfback is a noun.
halfback
Burt Reynolds
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
Eddie Bell - halfback - died on 2009-11-16.
Eddie Bell - halfback - was born on 1931-03-03.
Calvin Jones - halfback - was born on 1970-11-27.
Sam Baker - halfback - was born on 1930-11-12.
Sam Baker - halfback - died on 2007-06-05.