since 'most' of the purpose of songs is to convey a feeling or image or story to others, I'm not a bit surprised that 'ungulate' or 'dyspepsia' or 'vicissitude' seldom appear in song....except in order to show off or be Flanders & Swann.

just think about how famous old songs like "Twinkle, Twinkle Little Star" appear when they are translated into geek-speak....