it is good to know words, but here is a famous warning..(one of multitudenous variations)

" In promulgating your esoteric cogitations or articulating your superficial sentimentalities and amicable, philosophical or psychological observations, beware of platitudinous ponderosity. Let your conversational communications demonstrate a clarified conciseness, a compact comprehensibleness, no coalescent conglomerations of precious garrulity, jejune bafflement and asinine affectations. Let your extemporaneous verbal declarations have lucidity, intelligibility and veracious vivacity without rodomontade or thrasonical bombast. Sedulously avoid all polysyllabic profundity, pompous propensity, psittaceous vacuity, ventriloquial verbosity and vaniloquent vapidity. Shun double-entendres, obnoxious jocosity and pestiferous profanity, observable or apparent."