1. That may be pierced.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• perferable,
• -performable,
• oerforable,
• lerforable,
• -erforable,
• 0erforable,
• pwrforable,
• psrforable,
• pdrforable,
• prrforable,
• p4rforable,
• p3rforable,
• peeforable,
• pedforable,
• pefforable,
• petforable,
• preforable,
• perforrable,
• perfowrable,
• performbable

The adjective form of "perforable" is "perforated".

The plural form of the word "perforable" is "perforables".

The singular form of the word "perforable" is "perforable". It remains the same in both singular and plural forms.