abel / able are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
abel: (noun) Norwegian mathematician (1802-1829). (noun) (Old Testament) Cain and Abel were the first children of Adam and Eve born after the Fall of Man; Abel was killed by Cain.
able: (adjective) (usually followed by `to') having the necessary means or skill or know-how or authority to do something. (adjective) have the skills and qualifications to do things well. (adjective) having inherent physical or mental ability or capacity. (adjective) having a strong healthy body.
abel: EY·b·ah·l
able: EY·b·ah·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)