What musical term indicates a tempo that is fairly fast, slightly slower than allegro?

The term that indicates a tempo that is fairly fast and slightly slower than allegro is "allegretto." This word translates to "slightly brisk" in Italian and is often used to describe a lively tempo that falls between andante and allegro. It is typically understood to convey a cheerful, moderately fast pace, making it an ideal choice for pieces that require an upbeat but not overly rapid quality.

In contrast, "presto" refers to an extremely fast tempo, well beyond allegro, which makes it unsuitable for indicating a tempo slightly slower than allegro. "Molto" means "very" and is often used as a modifier for other tempo markings but does not stand alone as a tempo indication. "Rallentando" is a directive to gradually slow down, rather than a specific tempo, and therefore does not apply to steady tempo indications.