Holdouts rhymes with:
handouts, hideouts, standouts, bailouts, blackouts, blowouts, breakouts, brownouts, buyouts, checkouts, cookouts, cutouts, dropouts, dugouts, eelpouts, fallouts, handouts, hangouts, hereabouts, hideouts, knockouts, layouts, lockouts, payouts, printouts, pullouts, sellouts, stakeouts, standouts, strikeouts, tryouts, turnouts, walkouts, washouts, whereabouts, workouts
Holdouts sounds like:
halts, health's, healthweek, helds, helots, hilditch, hilts, hiltz, hladik, hladky, holds, holiday's, holidays, hollatz, holliday's, hollywood's, holt's, holthaus, holthus, holts, holtz, holtz's, hult's, hults, hultz