言葉 (ことば) Word, Language, Manner Of Speech
単語 (たんご) Word, Vocabulary
熟語 (じゅくご) Compound Word, Compound Kanji, Jukugo
外来語 (がいらいご) Foreign Word, Borrowed Word, Loanword
同音異義語 (どうおんいぎご) Homonym, Homophone
禁句 (きんく) Taboo Word, Taboo Phrase, Dirty Word, Bad Word