This is one of my favorite words, although I've only used it twice in my poetry, once in a baseball poem and one about lurve.
Wiki says--In poetry, syzygy is the combination of two metrical feet into a single unit, similar to an elision. Consonantal or phonetic syzygy is also similar to the effect of alliteration, where one consonant is used repeatedly throughout a passage, but not necessarily at the beginning of each word.
Mathematician James Joseph Sylvester (1814-1897) employed "the apt juncture of syllables" in his poetry, a serious avocation and the subject of an article in the current Bulletin of the AMS. The author speculates "about which of the nine muses would most likely have been given the assignment of overseeing [Sylvester's] monochromatic verse.. "'The deaf one,'" some wag volunteered.