Shibboleth rolls on the tongue rather nicely. Admonition does so, too.
Castigate, bloviate, crux, erudition, all excellent words, infrequently
Spoken, perfect for pedantic poets to graft onto otherwise meritless
Works. Wholly impassible to but a few, such efforts, akin to Peruvian
Thickets, draw linguists and graduates to their thesauruses
Searching for synonyms.