(n) old boy
(n) (obsc) gamboge tree
(n) (comp) keyboard input
(n) playing catch (wasei: catch ball)
(n) cannonball
(n) clipboard
(n) green boy
(n) (comp) sound board
(n) soccer ball
football (as used in soccer)
(n) seaborgium (Sg)
(n) sissy (wasei: sister boy)
(n) (comp) system board
(n) city boy
(n) shoot ball (baseball)
shooter
screwball
(n) jump ball
(n) (abbr) junior board of directors
(n) SuperBall
(n) schoolboy
(n) skateboard
(n) storyboard
(n) (comp) straw vote
straw ballot
(n) speedboat
(n) speed ball
fastball (baseball)
(n) spitball
(n) soft ball
sponge ball
(n) centerboard
(n) dashboard
dash
(n) (col) male virgin (wasei: cherry boy)
(n) tennis elbow
(n) trackball