Incongruous
Part of speech: adjective
Definition: Not similar or congruent; not matching or fitting in.
Ironic
Part of speech: adjective
Definition: Both coincidental and contradictory in a humorous or poignant and extremely improbable way.
Example sentence: Swimming is probably the ultimate of burnout sports. It's ironic because millions of people who swim as their regular exercise love the meditation aspect of it; you don't wind up with any orthopedic injuries. But when you swim at a world class level for hours and hours - the loneness of the long distance runner.