2 syllables:
-plasm, chasm, clasm, has him, hlasm, nazim, plasm, shazam, spasm, vasum, wdasm

3 syllables:
chiasm, empasm, fantasm, germplasm, ildasm, miasm, ooplasm, phantasm, proplasm, sarcasm

4 syllables:
alloplasm, archiplasm, archoplasm, axoplasm, bioplasm, bronchospasm, cataclasm, catapasm, cataplasm, centroplasm, chakkappazham, cheirospasm, chiliasm, chirospasm, chromoplasm, cranioclasm, cytoplasm, deutoplasm, diapasm, ectoplasm, endoplasm, entheasm, entoplasm, exoplasm, graphospasm, hesychasm, hygroplasm, iconclasm, idiasm, isochasm, kinoplasm, metaplasm, mycoplasm, myoplasm, myospasm, mythoplasm, neoplasm, neuroplasm, openqasm, ovoplasm, paraplasm, periplasm, piroplasm, protoplasm, sarcoplasm, schediasm, sporoplasm, stethospasm, teleplasm, trophoplasm, vasospasm

5 syllables:
autoschediasm, biblioclasm, blepharospasm, cardiospasm, demoniasm, deuteroplasm, enterospasm, enthusiasm, ergastoplasm, heteroplasm, hyaloplasm, iconoclasm, idioplasm, idiospasm, karyoplasm, kinetoplasm, laryngospasm, nazriya nazim, nucleoplasm, pharyngospasm, pylorospasm, somatoplasm, stereoplasm, telephantasm

6 syllables:
aphrodisiasm, arteriospasm, corybantiasm, esophagospasm, pseudoneoplasm

7 syllables:
curb your enthusiasm, malignant neoplasm, overenthusiasm

9 syllables:
symbiopsychotaxiplasm

2 syllables:
fathom

3 syllables:
sargassum