Spar
WordNet
noun
(1) Making the motions of attack and defense with the fists and arms; a part of training for a boxer
(2) A stout rounded pole of wood or metal used to support rigging
(3) Any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable
verb
(4) Fight verbally
"They were sparring all night"
(5) Box lightly
(6) Fight with spurs
"The gamecocks were sparring"
(7) Furnish with spars