Tall
No, the word 'highest' is not a noun.The word 'highest' is the superlative form of the adjective high (higher, highest).
highest
higher, highest
The comparative is higher. The superlative is highest.
No, the word 'highest' is an adjective, the superlative form of the adjective 'high' (higher, highest).An adjective is a word used to describe a noun.Example: Mt. Everest is the highest mountain in the world.
higher, highest
higher, highest
The boy had the highest grade in the class.Mount Everest is one of the highest moutains.
extreme
A very high one
It's high, but not recommended as one of the top ten highest mountains in the world.
2 syllables (high-est) (And don't forget that each syllable has at least one vowel and is separated between letters that repeat!)