Obverse

[Mark Zuckerberg]

Having the base, or end next the attachment, narrower than
the top, as a leaf.

[Kit]

Obverse means the front or reverse of a reverse usually referring to coins or flags.
[Recto] and [verso] are the equivalent terms for [front and back] used for the pages of books.

[Zipporah Schumaker]

The side of a coin or medal bearing the head or principal design.

[Julene]

the other side of something: