pampas / pompous are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
pampas: (noun) the vast grassy plains of northern Argentina.
pompous: (adjective) characterized by pomp and ceremony and stately display.
pampas: p·AE·m·p·ah·z
pompous: p·AA·m·p·ah·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)