Mcguffin rhymes with:
mcmuffin, muffin, toughen, acetaminophen, altenhofen, carstarphen, dalfen, deafen, dextrathoraphan, dolphin, draffen, entoffen, farfen, geffen, giffen, griffen, griffon, hafen, hanifen, hyphen, ibuprofen, kniffen, lafon, ludwigshafen, mcmuffin, morphin, muffin, offen, often, orphan, paraffin, siphon, sniffen, soften, steffan, steffen, stephan, stiffen, sutphen, syphon, tamoxifen, toughen, xenophon
Mcguffin sounds like:
maccabean, mangiapane, mcbain, mcbane, mcbean, mccubbin, mcfann, mcfun, mcgavin, mcgibbon, mcgivney, mckibben, mckibbin, mckibbon, megaphone, misshapen, mississippian