Aperture Synthesis (Synthesis Imaging) is a method of using an Interferometer to produce an image with an Angular Resolution as would be provided by a single Aperture as wide as the baseline length. It is used for Visible Light, Infrared (IR), Microwave, and Radio astronomy.
I am not sure whether all Interferometer use can be labeled Aperture Synthesis.
Fast Fourier Transform Telescope
Low-Frequency Array (LOFAR)