Hull Kingston Rovers ran away with it in the second half as they reached the Challenge Cup quarter-finals at the expense of Featherstone.
The home side led 16-8 at the break after tries from Ben Fisher, Jason Netherton and Dwayne Barker.
Featherstone's points came from a try and two goals from Stuart Dickens.
They added a Mathew Wray try after the break but Scott Murrell, Leroy Rivett, Michael Smith, John Goddard and Ben Cockayne all scored for Hull KR.
Hull KR: (16) 44 Tries: Fisher, Netherton, Barker, Murrell, Rivett, Smith, Goddard, Cockayne Goals: Couturier 3, Murrell 3
Featherstone: (8) 12 Tries: Dickens, Wray Goals: Dickens 2
Hull KR: Cockayne, Rivett, Couturier, J. Goddard, Ford, Murrell, Webster, Aizue, Fisher, Price., Morrison, Netherton, Gallacher. Replacements: Garmston, Ellis, Barker, Smith.
Featherstone: Larvin, McHugh, Batty, Cardoza, Wray, Blakeway, Fawcett, Tonks, Swinson, Dickens, Kirmond, Huston, Dooler. Replacements: Sutton, Ellery, C. Hughes, Carlton.
Referee: R Laughton (Barnsley)
- courtesy BBC Rugby League