high-sounding 
adjective
(Of language or ideas) extravagant and grand: high-sounding moralism...
- Government broadcasting policy has always been surrounded by high-sounding rhetoric, but the need to ensure financial viability while filling the programming needs of a voracious medium has always been the basic driver of TV practice.
- Despite their high-sounding rhetoric, however, initial reforms were halting, and throughout the 1990s Ukraine endured severe stagnation.
- This high-sounding rhetoric is all well and good as theory, but it goes only so far in the real world, as other passing novelists point out.
Synonyms
grand-sounding, grandiloquent, magniloquent, high-flown, extravagant, exaggerated, elaborate, flowery, florid, ornate, overblown, overripe, overdone, overwrought, grandiose, lofty, rhetorical, oratorical;
verbose, inflated, affected, pretentious, turgid, bombastic, declamatory
informal windy, purple, highfalutin, la-di-da
rare fustian, euphuistic, orotund, tumid