What word that begins with the letter P is a synonym for opposite?

There are many possible Words based on the meaning of "plain" that is used.

The Word pretty used a woman's appearance could be the opposite of plain.

The Word peak used for a mountain would be the opposite of a plain or prairie.

The Words pretentious, pompous, or poshcould be the opposite of a plain or ordinary event.

The Word private could be the opposite of something plain, as in obvious.

The Word phenomenal could be the opposite of a plain or mundane experience.

The Word prodigious could be the opposite of a plain performance.