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