目玉【めだま】
eyeball, special feature, centerpiece, showpiece, drawcard, special program, loss leader, sunny-side up fried egg
お年玉【おとしだま】
New Year's gift (usu. money given to a child by relatives and visitors)
目玉商品【めだましょうひん】
bargain goods, loss leader, eye-catching goods, featured product
珠玉【しゅぎょく】
jewel, gem, gem (of a story, essay, etc.), accomplished work, beautiful piece
水玉【みずたま】
drop of water, polka dots
替え玉【かえだま】
stand-in, proxy, substitute, double, ringer, second serving of noodles (to add to one's remaining ramen broth)
悪玉【あくだま】
bad character, bad person, villain, baddie
善玉【ぜんだま】
good person, good guy, character with a round white head on which the character "good" is written (common in Edo-period prints)
火の玉【ひのたま】
fireball, ball of fire, will-o'-the-wisp, jack-o'-lantern
手玉【てだま】
beanbags, jackstones, cueball
白玉【しらたま】
white gem (esp. a pearl), rice flour dumpling, white-flowered camellia
親玉【おやだま】
boss, chief, head
勾玉【まがたま】
magatama, comma-shaped bead from prehistoric Japan, usually made of jade
玉音【ぎょくおん】
the Emperor's voice, beautiful voice, beautiful sound