Zilch rhymes with:
filch, milch, pilch, balch, belch, bolch, dolch, felch, filch, gulch, kelch, milch, mulch, pilch, squelch, ulch, walch, welch, welsh
Zilch sounds like:
zale's, zaleski, zalesky, zalewski, zaley's, zawislak, zealous, zelasko, zelek, zelikow, zelko, zelos, zielke, zilka, zilkha, ziolkowski, zoellick, zoology, zuehlke, zuelke, zuhlke, zuluaga, zulus, zylka