1 syllable:
bloop, boop, cloop, coop, coupe, croop, croup, croupe, d-loop, dhoop, doupe, droop, drupe, dupe, floop, froop, gloop, goop, group, groupe, grupe, hoop, houp, hupe, knoop, koop, loop, loope, loup, loupe, lupe, mvgroup, oop, p-group, p-to-p, poop, r-loop, roop, roope, roupe, rupe, scoop, scoup, scroop, shoop, shoup, shoupe, shupe, sloop, sloup, snoop, soup, soupe, sqoop, stoop, stoup, stroop, stroope, stroup, stroupe, stupe, swoop, swoope, t-group, throop, toupe, troop, troup, troupe, whoop

2 syllables:
500px, age-group, age group, aggroup, air group, amx-10p, arrupe, arup, astoop, blood group, boskoop, calgroup, closed-loop, core group, deathloop, duck soup, eastgroup, ecoop, firstgroup, ground loop, hadoop, hencoop, in-group, ingroup, ing group, inhoop, jazz group, kin group, loop-the-loop, loup-loup, mslgroup, newsfroup, newsgroup, nso group, oddloop, out-group, outgroup, pagegroup, pea soup, peer group, playgroup, play group, psy-group, rap group, recoup, recoupe, redhoop, regroup, rock group, saloop, scoopwhoop, scout group, scout troop, self-coup, siroop, sky group, stem-loop, strongloop, subgroup, sungroup, unhoop, verloop, vingroup, waldroop, waldroup, war whoop, wynkoop, zeitlupe

3 syllables:
1440p, alley-oop, alleyoop, aptargroup, aqualoop, armorgroup, as a group, battle group, bioscoop, busy-loop, chicken coop, chicken soup, citigroup, cock-a-hoop, contrecoup, countercoup, dpdgroup, easygroup, eneloop, ethnic group, ethyl group, eurogroup, green pea soup, guadalupe, guadeloupe, haplogroup, hula-hoop, hyperloop, interest group, intergroup, intragroup, jappeloup, keetmanshoop, kinship group, lentil soup, linkage group, liripoop, make a scoop, medisgroup, methyl group, multigroup, nincompoop, noah jupe, outside-group, overloop, paratroop, pressure group, pseudocroup, pultegroup, quasigroup, semigroup, serogroup, social group, softbank group, splinter group, supergroup, tata group, trou-de-loup, trous-de-loup, turtle soup, vinyl group, virgin group, wagner group, working group

4 syllables:
2160p, amphibole group, animal group, arianegroup, arsenic group, basketball hoop, c0-semigroup, cyanide group, encounter group, green turtle soup, helium group, human-in-the-loop, interest-group, lazada group, manpowergroup, meteogroup, methylene group, mock turtle soup, musical group, tales from the loop, the blackstone group, the lego group, the vanguard group, vegetable soup

5 syllables:
alibaba group, embroidery hoop, expedia group, hyundai motor group, warner music group

6 syllables:
biological group, mathematical group, occupational group, timi studio group

7 syllables:
revolutionary group, warner animation group

8 syllables:
our lady of guadalupe