Rhymes with 'sub'
Scots Language Rhymes
crub
            (Scots for curb)
dub
            (Scots for pool or pond)
gub
        (Scots for n. mouth or v. to hit esp. in mouth)
Scottish-English Rhymes
blub
                bub
                club
                cub
                dub
                grub
                hub
                nub
                pub
                rub
                scrub
                shrub
                snub
                stub
                sub
                tub
                gastropub
                overdub