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