WAC vs Women's Army Corps

WAC and Women's Army Corps both are nouns.

Word	Noun	Adjective	Verb	Adverb
WAC	Yes	No	No	No
Women's Army Corps	Yes	No	No	No

As nouns, WAC and Women's Army Corps are synonyms defined as:

WAC and Women's Army Corps: an army corps that was organized in World War II but is no longer a separate branch of the United States Army

WAC (noun)	Women's Army Corps (noun)
an army corps that was organized in World War II but is no longer a separate branch of the United States Army	an army corps that was organized in World War II but is no longer a separate branch of the United States Army