mountain?
A seven letter word that means a high shrill sound would be "whistle".
Aguirre Meaning: one who came from a high, lofty place, or a place of eminence.
low
Yourmom
promontory
glockenspiel?
nth
The word could be jumpy or tense.
Monsoon.
The name "Illawarra" is believed to be a corruption of a local aboriginal word, alowrie, meaning "high pleasant place by the sea."
Steep as a verb: dunk, soak.Steep as an adjective: high, bold.
Maybe Punt, especially if its an American crossword