汚染源[osengen] source of pollution
音源[ongen] sound source
禍源[kagen] source of misfortune
供給源[kyoukyuugen] source of supply
経営資源[keieishigen] management resource

源氏物語[genjimonogatari] the Tale of the Genji
源泉[gensen] source
源流[genryuu] current-limiting
語源[gogen] word root

オブジェクト指向言語[obujekutoshikougengo] object-oriented language
コンピュータ用語[konpyuutayougo] computerese
スウェーデン語[suweedengo] Swedish (language)
スペイン語[supeingo] Spanish (language)
スワヒリ語[suwahirigo] Swahili (language)

チャン語[chango] Chinese (language)
ドイツ語[doitsugo] German (language)
フランス語[furansugo] French (language)
プログラム言語[puroguramugengo] programming language
ペルシャ語[perushago] Persian (language)

異説[isetsu] different opinion
一説[issetsu] one theory (opinion)
演説[enzetsu] speech
臆説[okusetsu] hypothesis
解説[kaisetsu] explanation

解説者[kaisetsusha] commentator
概説[gaisetsu] general statement
学説[gakusetsu] theory
勧説[kanzei] urging
甘い小説[amaishousetsu] sentimental novel