悪球[akkyuu] hard ball to hit
逸球[ikkyuu] muffed ball
衛星地球局[eiseichikyuukyoku] (satellite) earth station
眼球[gankyuu] eyeball
気球[kikyuu] balloon

球戯[kyuugi] billiards
球技[kyuugi] ball game (e.g. baseball, tennis, soccer)
球菌[kyuukin] coccus
球形[kyuukei] globular or spherical shape

琉璃[ruri] lapis lazuli
琉球列島[ryuukyuurettou] Ryukyu Islands
琉球諸島[ryuukyuushotou] Ryukyu Islands
琉球音階[ryuukyuuonkai] Okinawan scale (hemitonic pentatonic scale: do, mi, fa, so, ti)
琉球語[ryuukyuugo] Ryukyuan languages

琉歌[ryuuka] Okinawan fixed form poetry
三筋琉球雀鯛[misujiryuukyuusuzumedai] whitetail dascyllus (Dascyllus aruanus, species of damselfish from the Indo- West Pacific)
琉球芋[ryuukyuuimo] sweet potato (Ipomoea batatas)
琉球藍[ryuukyuuai] Assam indigo (Strobilanthes cusia)
琉球古武術[ryuukyuukobujutsu] Okinawan kobudo

位階[ikai] court rank
位階勲等[ikaikuntou] court rank and honors
一階[ikkai] one floor
音階[onkai] musical scale
下層階級[kasoukaikyuu] proletariat

階下[kaika] lower floor
階級[kaikyuu] (social) class
階級章[kaikyuushou] rank insignia
階級闘争[kaikyuutousou] class struggle

ト音記号[toonkigou] G clef
ハ音記号[haonkigou] C clef
ヘ音記号[heonkigou] F clef
哀音[aion] sad voices
異音[ion] allophone

異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice
一音節[ichionsetsu] monosyllable
一口同音[ikkudouon] reading in unison
羽音[haoto] sound of flapping wings (of a bird)