1 syllable:
bupp, chupp, cup, cupp, grupp, hupp, jsonp, knupp, krupp, njdep, pup, puppe, rupp, ruppe, schlup, schrupp, schtup, schupp, schuppe, shmup, shtup, shupp, skrip, strupp, stupp, sup, suppe, throp, trupp, truppe, upp, yup

2 syllables:
act-up, all-up, back-up, backup, bacup, balls-up, bang-up, beat-up, beefed-up, blow-up, blown-up, blowup, boot-up, bootup, booze-up, boozed-up, botch-up, break-up, breakup, brew-up, brush-up, brushup, build-up, buildup, built-up, bull-pup, burn-up, burnup, bust-up, call-up, canup, carve-up, catch-up, change-up, changeup, check-up, checkup, chin-up, churned-up, clean-up, cleanup, close-up, closeup, clued-up, cock-up, cockup, crack-up, crackup, crudup, cut-up, cutup, dial-up, dialup, dress-up, dried-up, drive-up, dust-up, dustup, egg-cup, eggcup, errno.h, eye-cup, eyecup, face-up, faceup, fedup, fill-up, fit-up, fix-up, flare-up, flip-up, fold-up, foldup, foul-up, fouled-up, frame-up, frameup, freeze-up, fry-up, fuck-up, fucked-up, get-up, getup, give-up, goldcup, goof-up, greenup, grown-up, grownup, gupshup, half-cup, hang-up, hangup, heads-up, heaped-up, hickup, hicup, high-up, hold-up, holdup, hook-up, hookup, hung-up, hyped-up, jack-up, jam-up, jessup, joined-up, jump-up, kampfgruppe, kickup, kingcup, kip-up, knees-up, knock-up, lace-up, lash-up, latch-up, lay-up, lead-up, leafcup, leg-up, lendup, let-up, letup, line-up, lineup, link-up, linkup, lit-up, lock-up, lockup, look-up, loved-up, made-up, madeup, make-up, makeup, mangup, mark-up, markup, mash-up, mashup, match-up, matt-up, meetup, mess-up, mishcup, mix-up, mock-up, mockup, mooncup, moosup, mop-up, muck-up, navsup, nip-up, nohup, northup, nosh-up, oilcup, one-up, paid-up, paste-up, pasteup, patch-up, pay-up, pent-up, pick-me-up, pick-up, pickup, pile-up, pileup, pin-up, pinup, piss-up, pissup, pop-up, pre-nup, prenup, press-up, printup, puffed-up, pull-up, punch-up, push-up, pushup, put-up, ramp-up, rave-up, re-up, riseup, roll-up, round-up, roundup, run-up, runup, scale-up, scaleup, schnez-truppe, schutztruppe, schwarz-gruppe, screw-up, screwed-up, screws-up, scrub-up, selkup, send-up, sendup, set-up, setup, shake-up, shakeup, shape-up, shapeup, shook-up, shoot-up, show-up, shut-up, shutup, sidcup, sighup, sign-up, sit-up, situp, skrew-up, slap-up, slip-up, slipup, smash-up, smashup, snarl-up, sneak-cup, speed-up, speedup, spin-up, split-up, stackup, stalcup, stallcup, stand-up, standup, start-up, startup, steep-up, step-up, sternschnuppe, stick-up, stickup, stitch-up, straight-up, stuck-up, stuckup, stuffed-up, suck-up, sum-up, sumup, sun-up, suncup, take-up, takeup, teacup, team-up, thumbs-up, tie-up, tilt-up, tip-up, tittup, ton-up, top-up, toss-up, tossup, touch-up, trip-up, true-up, tune-up, tuneup, turn-up, turnup, tweetup, two-up, used-up, wake-up, wakeup, walk-up, walkup, warm-up, warmed-up, warmup, wash-up, washup, wasup, whitecup, wickup, wind-up, windup, wisecup, work-up, wound-up, wrap-up, write-up, writeup, wrought-up, zip-up

3 syllables:
arbeitsgruppe, arcade1up, beaten-up, belly-up, bottom-up, bundled-up, buttercup, buttoned-up, caller-up, cover-up, coverup, double-up, dressed-up, dressing-up, drying-up, einsatzgruppe, envolup, folded-up, follow-up, followup, giddy-up, higher-up, hopped-up, hurry-up, hushed-up, juiced-up, jumped-up, knocker-up, lighting-up, making-up, marked-up, messed-up, mixed-up, modula-p, monkey-cup, mopping-up, muscle-up, power-up, pricking-up, pumped-up, rdiff-backup, right-side-up, robocup, rolled-up, runner-up, runners-up, setting-up, seven-up, sexed-up, shoot-em-up, souped-up, stepped-up, stopped-up, summing-up, thyssenkrupp, tidy-up, trickle-up, trumped-up, washed-up, washing-up, well-brought-up, wickiup, winding-up

4 syllables:
bacdafucup, bacthafucup, johnny-jump-up, puckered-up

7 syllables:
dfl-supercup

1 syllable:
snub, shrub, cub, club, grub, scrub, dub, hub, nub, drub, stub, rub, pub, tub, sub

2 syllables:
subshrub