Dress or pant suit?

For a job interview - is a professional dress with black tights and heels with a black blazer equivalent to a pant suit? I can’t for the life of me find a pant suit but I have a very formal interview tomorrow with no time to shop :(

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official