Translation of "Featureless" in Japanese

And we saw a featureless silver disc hovering over the houses.

特徴のない銀色の円盤が 住宅の上に浮かんでいました

But it’s hard to navigate the vast, featureless dunes in the dark.

‎真っ暗な砂丘で ‎メスを探すのは大変だ