| Word | Definitions | Synonyms |
|---|---|---|
| errant | (adjective) straying from the right course or from accepted standards | - |
| (adjective) uncontrolled motion that is irregular or unpredictable | - | |
| erratic | (adjective) liable to sudden unpredictable change | Synonyms: fickle, mercurial, quicksilver |
| (adjective) likely to perform unpredictably | Synonyms: temperamental | |
| (adjective) having no fixed course | Synonyms: planetary, wandering |