I’m going to get a bit ‘design snobby’ with you for this design term. Lettering refers to hand drawn or hand made type, not a font. Lettering ranges from scribbled raw type to perfect points and curves, which sometimes makes it hard to tell if its a font or not. It stands out apart from a font because it’s one of a kind and has it’s own unique details.
Jessica Hische goes into more detail explaining the difference between lettering and fonts. And she’s also a great letterer.