The colours were indistinguishable at the distance, drenched and sodden.
Both in looks and behavior he is indistinguishable from other strong rats.
A camel is indistinguishable from a peanut—if only their humps be considered.
The solar system was behind them, indistinguishable from the other stars.
The voices that came down to them were jumbled, faint, indistinguishable.