het·er·oph·o·ny 
(hĕt′ə-rŏfə-nē)
(hĕt′ə-rŏfə-nē)n.
The simultaneous playing or singing of two or more versions of a melody.
het′er·o·phonic (-ər-ə-fŏnĭk) adj.
- stichometric
- stichometry
- stichomythia
- stichomythic
- stichomythy
- stick
- stick around
- stickball
- stickballer
- stick by one's guns
- sticked
- sticker
- sticker price
- sticker shock
- stick figure
- stickhandle
- stickhandler
- stickily
- stick in craw
- stickiness
- sticking plaster
- sticking point
- stick in (one's) craw
- stick in one's craw
- stick insect