Words That Rhyme With "Toughen" :
2 syllables:
Baffin, biffin, boffin, bussen, coffin, coven, deafen, grafen, griffin, griffon, gryphon, hushen, hyphen, loven, muffin, offen, often, oven, Prussian, puffin, roughen, Russian, scutcheon, siphon, sloven, sniffen, soften, syphon
3 syllables:
concussion, discussion, escutcheon, Mcguffin, misgovern, percussion
4 syllables:
Belorussian, Byelorussian, ibuprofen, inescutcheon, repercussion, thermosiphon