| alien smuggling | 2.70 | One count of alien smuggling. | ||
| alien abduction | 2.63 | Alien abductions. | ||
| alien species | 1.97 | Alien species are invading cities, too. | ||
| alien concept | 1.65 | Paved roads and mail deliveries are alien concepts. | ||
| alien invasion | 1.51 | Alien invasion? | ||
| alien spacecraft | 1.32 | Also Friday night, another alien spacecraft crash-lands on the Fox network. | ||
| alien life | 1.25 | Alien life. | ||
| alien culture | 1.18 | The latter had been undeveloped while I lived in alien cultures. | ||
| alien invader | 1.18 | Alien invaders? | ||
| alien world | 1.18 | Four quiet windows on to an alien world. | ||
| alien spaceship | 1.05 | At least one alien spaceship crashed in Roswell, N.M., way back when. | ||
| alien creature | 0.99 | The children decide that it is an alien creature. | ||
| alien being | 0.92 | But they also fear television as an alien being. | ||
| alien race | 0.92 | Players slip into the skin of three alien races. | ||
| alien civilization | 0.72 | No reliable radio signal from an alien civilization has been detected. | ||
| alien environment | 0.72 | In that alien environment, somehow it all makes sense. | ||
| alien smuggler | 0.72 | Immigration agents also arrested two people suspected of being alien smugglers. | ||
| alien landscape | 0.66 | The alien landscape and atmosphere are eerily realistic. | ||
| alien planet | 0.59 | A charming little space explorer crashes on an alien planet. | ||
| alien status | 0.53 | They can apply for permanent resident alien status next April. |