穏子: a female given name

怨霊: a ghost, particularly a vengeful or malevolent one

音声: voice, audio

音源: source of a sound; / 音源: (computing) device or chip that produces sound; / 音源: (music) recording.

Kyūjitai form of 国際歌 (“The Internationale”)

a common blackbird

the poem traditionally attributed to Wani in the Kokin Wakashū kana preface:

Kyūjitai form of 愛国歌 (“Aegukka, the North Korean national anthem”) / Kyūjitai form of 愛国歌 (“Aegukga, the South Korean national anthem”)

obligation

sound; echo; voice