Exploit
Part of speech: noun
Definition: A heroic or extraordinary deed. An achievement. A program or technique that exploits a vulnerability in other software.
Part of speech: verb
Definition: To use for one's own advantage.
Example sentence: Any fool can have bad luck; the art consists in knowing how to exploit it.
Feat
Part of speech: noun
Definition: An accomplishment that's relatively rare or difficult.
Example sentence: It's a great feat for me to have broken my world record.