twin towers vs WTC

twin towers and WTC both are nouns.

Word	Noun	Adjective	Verb	Adverb
twin towers	Yes	No	No	No
WTC	Yes	No	No	No

As nouns, twin towers and WTC are synonyms defined as:

twin towers and WTC: twin skyscrapers 110 stories high in New York City; built 1368 feet tall in 1970 to 1973; destroyed by a terrorist attack on September 11, 2001

Other synonyms of twin towers include World Trade Center.

twin towers (noun)	WTC (noun)
twin skyscrapers 110 stories high in New York City; built 1368 feet tall in 1970 to 1973; destroyed by a terrorist attack on September 11, 2001	twin skyscrapers 110 stories high in New York City; built 1368 feet tall in 1970 to 1973; destroyed by a terrorist attack on September 11, 2001