Any fourteen line poem or stanza other than the sonnet.
Since the word is French and derived from quatorze (fourteen), We dont know why sonnets are excluded. Maybe its because sonnets are Italian and
used heavily by the English?
Blues Sonnet, Bref Double, Pleiadic, Quartina, Rondel Supreme, Scupham sonnet, Song That Luc Bat Sonnet,
Terza Rima Sonnet