The term is exorbitant. Something with a high price is called expensive.
Yes, the word high has one syllable.
The word you are looking for is "obstinate." It means refusing to change one's opinion or course of action despite attempts to persuade one to do so.
That is the correct spelling of the word "flies". (Plural of the noun fly, and the present tense of to fly.)
High-traffic is typically considered as a compound word, so it is written as one word.
High has one syllable.
Since Manhattan is so densely populated, space comes at a very high price.
Acicular is the word applied to crystals that are long and thin; asbestos is one material that has a very high ration of length to width.
The word that works is idiot.
Soaring.
One.
Tall