Here's what rhymes with nonprojection.
protection projection direction section affection objection rejection ejection collection connection election reflection selection correction detection injection perfection connexion complexion dissection erection resection subjection defection introspection dejection redirection reflexion abjection interjection bisection refection trisection infection inspection intersection recollection resurrection deflection convection imperfection predilection disaffection reelection indirection confection retrospection insurrection inflection interconnection disconnection inflexion reinfection genuflection disinfection circumspection misdirection Words that almost rhyme with nonprojection
attention tension pension pectin beckon gentian mention profession session chairman oppression procession retention obsession reckon tendon cession ascension dentin pretension deaden destine penman pennon bellman deafen hessian seven heaven perception possession aggression dimension lesson prevention rebellion reception weapon accession brethren contention progression redemption regression repression suppression suspension deception detention lemon lessen recession resin contraception dissension distension headman leaden leaven melon pepsin felon headmen heron sexton chevron freshen lepton penguin hempen redden vegan pressman hellion question conception depression exception extension impression intention suggestion compression convention eleven invention succession apprehension comprehension concession confession hypertension intestine threaten congestion digestion inception secession freshman ingestion intercession condescension contravention digression distention inattention lengthen abstention declension henchmen interception preemption henchman stepson prepossession repossession selectman subvention headsman indention kelvin gremlin helpline nelson expression intervention discretion strengthen exemption transgression decompression indigestion dispossession retrogression concretion incomprehension preconception reinvention rhododendron delicatessen nonaggression reprehension misconception indiscretion misapprehension watermelon nonintervention autosuggestion supervention circumvention