1. That may be defended.

2. Defendable; defensive.

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

• despensible,
• defensable,
• defensifly,
• defensivly,
• defenseable,
• defensivley,
• defesible,
• defendable,
• defendible,
• defensibel,
• defenssible,
• decendible,
• desendible,
• refelxible,
• deprssible,
• defensiable,
• deffensable,
• difensible,
• difendible,
• difenssible

• defensive,
• defensiveness,
• deafness,
• defense,
• defense team,
• defensively,
• defence,
• defencelessly,
• deepness,
• defense force,
• defenceless,
• defenseless,
• devonshire.

The adjective form of "defensible" is "defensible".

The plural form of the word "defensible" is "defensibles".

The singular form of the word "defensible" is "defensible". The word is already in its singular form, and it does not change when referring to a single entity or thing.