Skyscrapers is a noun. It's the plural form of skyscraper.
No, the noun 'skyscraper' is not a standard collective noun. However, collective nouns are an informal part of language, any noun that suits the context of the situation can function as a collective noun; for example, a skyscraper of bureaucrats, a skyscraper of commerce, a skyscraper of excess, etc.
The average height of a story in a skyscraper is 8 to 10 feet, depending on what part of the world it is built in. The average total height of a skyscraper will also vary depending on what region it is in.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
what part of speech is work
adverb
the part of speech sashay is a averb
Did is a verb, and not is an adverb. Didn't is not any part of speech. It's a contraction of did and not.
The word speech is a noun.
Adjective