2 syllables:
bloom in, blumen, boomen, boom in, bumann, chuman, crewmen, cuman, cumin, doman, duman, flumen, heuman, heumann, hooman, human, humann, humin, krooman, kroomen, krumen, lewman, looman, luman, lumen, lumin, lumine, moomin, mumin, neuman, neumann, newman, newmann, numan, numen, room in, ruman, rumen, rumun, schuhmann, schuman, schumann, shuman, shumen, soo min, suman, thuman, thumann, tomb in, tooman, touman, truman, tuman, tumen, tyumen, vrooman, whom in, xiumin, youman, yuman, zoom in

3 syllables:
acumen, aircrewman, albumen, albumin, albumine, alumen, alumin, alumine, assume in, bakuman, bitumen, cacumen, canoeman, cerumen, curcumin, enlumine, illumine, inhuman, inlumine, legumin, makehuman, meglumine, mehuman, non-human, nonhuman, panhuman, prehuman, quadrumane, relumine, resumen, saruman, shikumen, subhuman, transhuman, unhuman, volumen, von neumann

4 syllables:
adam neumann, antihuman, archivehuman, burakumin, catechumen, conalbumin, duralumin, energumen, harry truman, indihumin, infrahuman, john von neumann, kinnikuman, lactalbumin, metahuman, metalbumin, ovalbumen, ovalbumin, paralbumin, paraluman, parvalbumin, prealbumin, preterhuman, protohuman, reillumine, semi-human, seralbumen, seralbumin, superhuman, thomas newman, toxalbumin

5 syllables:
harry s. truman, hemialbumin, lactoabumin, liselotte neumann, no longer human, pyrobitumen, serum albumin

6 syllables:
early modern human

7 syllables:
dying light 2 stay human