Synonyms for Able:

adj.

•able to perform well; having a proven capacity (adjective)
skilled, masterful, effective, expert, clever, talented, gifted, artful, ingenious, efficient, masterly, skillful, proficient, practiced, accomplished, brilliant, experienced, prepared, responsible.
•all (adjective)
capable.
•capable of performing; having an innate capacity (adjective)
adroit, apt, dexterous, smart, capable, powerful, competent, ready, agile, equipped, adept, strong, cunning, facile, deft, bright, intelligent, endowed, good, worthy.
•prepared (adjective)
ready.
•qualified (adjective)
good.
•skillful (adjective)
proficient, skilled, apt, masterful, deft, artful, agile, facile, genius, skillful, dexterous, nimble, Sure-footed, adept, expert, talented, crafty, handy, competent, capable, ambidextrous, versatile, clever, cunning, adroit, accomplished, efficient.

n.

wise, powerful, bungling, discerning, intelligent, clear-sighted, worthy, quick, gifted, endowed, academic, nimble-fingered, strong, well-rounded, bright, cut out for, brilliant, canny, ready, smart, ingenious. equipped, authorized, prepared, capable of, conversant with. ability, good. •able (noun)
capable, able-bodied, competent, fit, healthy.

Other synonyms:

academic, quick, crackerjack, inventive, prepared, clear-sighted, capable of, resourceful, discerning. all-around, responsible. brilliant. •clever
canny.
•competent
strong.
•skilled
experienced.
•trained
practiced.

Usage examples for able

1. I am not able to bear it." – The Lilac Sunbonnet by S.R. Crockett

2. Yes, I'm able to go. – The Story of a Doctor's Telephone--Told by His Wife by Ellen M. Firebaugh

3. He know so much, that make him able for the bad, see, like for the good. – Marie by Laura E. Richards