Blackout rhymes with:
bookout, breakout, checkout, cookout, knockout, lockout, lookout, shakeout, stakeout, strikeout, takeout, walkout, workout
Blackout sounds like:
balked, ballast, belched, bellsouth, belsito, bilked, biologist, blacked, blackest, blackett, blackheath, blackwood, blast, blasted, blazed, bleached, bleakest, blessed, blest, blight, blighted, blissett, blixt, blockade, blockaded, blocked, blockhead, blowiest, bluest, blushed, blust, bolstad, bulged, bulkhead, bullshit