| Share | Phrase |
|---|
| 10.63% | underwater [location] obstacle |
| 9.08% | strike obstacle [perform operation] |
| 8.88% | encounter obstacle [perform operation] |
| 5.94% | steer around obstacle |
| 5.64% | detect obstacle [perform operation] |
| 5.26% | obstacle in front |
| 3.44% | avoid obstacle [perform operation] |
| 3.24% | present obstacle [perform operation] |
| 3.08% | watercraft obstacle |
| 2.97% | obstacle to thief |
| 2.61% | contact with obstacle |
| 2.49% | clear obstacle [perform operation] |
| 2.35% | pass over obstacle |
| 2.24% | hit obstacle [perform operation] |
| 2.14% | present [chronology] obstacle |
| 2.09% | obstacle presence |
| 1.94% | negotiate obstacle [perform operation] |
| 1.66% | become obstacle [perform operation] |
| 1.63% | road obstacle |
| 1.61% | obstacle detector |
| 1.59% | front [location] obstacle |
| 1.58% | directly [temporal] obstacle |
| 1.50% | contact obstacle [perform operation] |
| 1.41% | obstacle to flow |
| 1.36% | obstacle sensor |
| 1.27% | clear [certainty] obstacle |
| 1.23% | space between obstacle |
| 1.19% | obstacle means |
| 1.06% | obstacle [does] exist |
| 1.01% | overcome obstacle [perform operation] |
| 0.94% | not obstacle |
| 0.92% | obstacle detection |
| 0.91% | sense obstacle [perform operation] |
| 0.82% | find obstacle [perform operation] |
| 0.76% | position obstacle [perform operation] |
| 0.64% | obstacle [does] cause |
| 0.57% | vehicle obstacle |
| 0.56% | obstacle member |
| 0.55% | place obstacle [perform operation] |
| 0.53% | obstacle show |
| 0.48% | device obstacle |