Question: are agile and nimble synonyms?
Answer: supple. Adaptable, as to changes. ... 
dexterous. Done with dexterity: ... 
limber. Flexible, pliant, bendable. ... 
stiff (antonym) ... 
swift-footed. That can run swiftly. ... 
lively. Full of life; active; vigorous. ... 
spry. Full of life; active, nimble, brisk, etc., esp. though elderly. ... 
deft. Skillful in a quick, sure, and easy way; dexterous.