The word "Rheiforme" is spelled as /riːɪˈfɔːm/. The first syllable "ree" is pronounced with a long "e" sound and the emphasis is on the first syllable. The second syllable "i" is pronounced with a short "i" sound followed by an "f" sound. The third syllable "forme" is pronounced with a long "o" sound followed by an "m" sound. Rheiforme refers to a taxonomic order of birds that includes rheas, large flightless birds native to South America.