(phonetics, prosody) metathesis (the transposition of letters, syllables or sounds within a word)

(linguistics) sound shift / (linguistics) sound shifts from Old Japanese to Modern Japanese, especially those which are preserved in historical kana usage.

Kyūjitai form of 音楽学 (“musicology”)

orthoepy

soundproofing material; sound-absorbing material

car horn

clear and deep (of water) / wide

string, thread

vinegar

handicraft, industrial art, woodwork / underground negotiation of political, foreign relations / activities of espionage