Common:
* Agile: able to move quickly and easily
* Ductile: able to be drawn out into a thin wire
* Fertile: producing or capable of producing abundantly
* Fragile: easily broken or damaged
* Futile: useless; pointless
* Gentile: kind; courteous
* Hostile: unfriendly; aggressive
* Juvenile: young; childish
* Mercile: cruel; without pity
* Mobile: able to move or be moved easily
* Pervasive: spreading widely throughout
* Servile: submissive; like a slave
* Subtle: delicate; not obvious
* Volatile: liable to change rapidly and unpredictably
Less Common:
* Acrimonious: bitter; sharp
* Audible: able to be heard
* Capable: having the ability to do something
* Compatible: able to exist or work together harmoniously
* Docile: easily managed or taught
* Exile: forced to live away from one's country
* Facile: too easy; superficial
* Fissile: capable of being split
* Flexible: able to bend easily
* Gullible: easily persuaded to believe something; credulous
* Mandible: relating to the jaw
* Penile: relating to the penis
* Protile: leaning forward
* Reptile: relating to reptiles
* Sile: relating to the siles (valley in Poland)
* Tenile: relating to a tent
* Tractile: capable of being drawn or pulled
* Virile: having strength and energy
This is not an exhaustive list, as there are many other adjectives ending in "-ile".