Typeface: is the design of the alphabet–the shape of the letters that make up the type style. The letters, numbers, and symbols that make up a design of type. So when you say “Arial” or “Goudy” ( examples of typefaces) you’re talking about a set of letters in a specific style.
Font: “is one weight, width, and style of a typeface. Before scalable type, there was little distinction between the terms font, face, and family. Font and face still tend to be used interchangeably, although the term face is usually more correct.”-Adobe’s type glossary
Examples of fonts: Wingdings, Chartwell
Readability is the ease with which a reader can recognize words, sentences, and paragraphs. Also including type design, layout and neatness.
Legibility is the ease with which a reader can recognize individual characters in text.]
Bummer (Classification: Traditional )
Characteristics: Bulmer’s distinguishing characters are an uppercase R with a curved tail. Lowercase g has a small bowl and a curved ear; a heavier stroke weight on the lower right side of the bowl contributes to a sense of that character leaning backwards. Uppercase italic characters J, K, N, T and Y are reminiscent of Baskerville’s
Rockwell (Classification: Mechanistic)
Characteristics: A serif at the apex of uppercase A is distinct. The lowercase a is two-storey. Because of its monoweighted stroke, Rockwell is used primarily for display or small-size use rather than lengthy bodies of body text.
Futura (Classification: Geometric)
Characteristics: geometric forms: near-perfect circles, triangles and squares. It is based on strokes of near-even weight, which are low in contrast. The lowercase has tall ascenders, which rise above the cap line, and uses a single-story ‘a’ and ‘g’, previously more common in handwriting than in printed text. The uppercase characters present proportions similar to those of classical Roman capitals.
Characteristics: The design is based on the letterforms of capitalis monumentalis or Roman square capitals, as used for the inscription at the base of Trajan’s Column from which the typeface takes its name. Trajan is an all-capitals typeface, as the Romans did not use lower-case letters. Twombly created the design taking inspiration from a full-size picture of a rubbing of the inscription.