“Display faces” are those designed to be used exclusively at large sizes. Many families include distinct styles for both display and text sizes.
See also:
— Condensed Faces
— Hairline Faces
— Ultra Faces
— Decorative Faces
And for smaller sizes:
— Text Faces for small sizes
— Agate + Micro for microscopic sizes
Try adding fewer fonts, fewer styles, or configuring the fonts with fewer features.