1. Capable of being realized
   "realizable benefits of the plan"
   - realisable [Brit] 
2. Capable of existing or taking place or proving true; possible to do
   - accomplishable, achievable, doable, manageable, realisable [Brit]

See also: possible, tangible

• thirdhand
• thirdly
• thirst
• thirst for knowledge
• thirster
• thirstily
• thirstiness
• thirsty
• thirteen
• thirteenth
• thirties
• thirtieth
• thirty
• Thirty Years' War
• thirty-eight
• thirty-eighth
• thirty-fifth
• thirty-first
• thirty-five
• thirty-four
• thirty-fourth
• thirty-nine
• thirty-ninth
• thirty-one
• thirty-second