sierra
A long chain of mountains or hills. / The word for the letter S in the NATO phonetic alphabet.
Noun
pl: sierras
When referring to geography, "sierra" specifically evokes a jagged, saw-toothed mountain range. While "mountain range" is a general term, "sierra" is frequently used when discussing regions in Spain, Latin America, or specific North American ranges like the Sierra Nevada. It carries a connotation of ruggedness and specific topographical character.
In the context of the NATO phonetic alphabet, "sierra" is used strictly for clarity in voice communication (such as aviation, military, or emergency services) to prevent the letter S from being confused with similar-sounding letters. In this register, it is used as a standalone identifier rather than a descriptive noun.