Words That Rhyme With "Umbilicus" :

3 syllables:

Millikan, pillowcase, silicates, silicle, silicon, willingness

4 syllables:

Archilochus, basilican, catholicos, cunnilinctus, unwillingness

5 syllables:

borosilicate, cyclosilicate, ferrosilicon, inosilicate, nesosilicate, phyllosilicate