Here's what rhymes with convectionally.
bidirectionally Words that almost rhyme with convectionally
conventionally affectionately obsessionally exceptionally intentionally sensually unconventionally objectionably unexceptionally eventually definitely celibacy professionally unintentionally congenitally sedulously textually sensuously genitally maritally unexceptionably unprofessionally delicacy genuinely indefinitely unquestionably delicately plentifully perilously questionably technocracy tenuously inequitably resonantly venomously garrulously nebulously decadently decadency inevitably gentlemanly irrevocably relevancy telegraphy creditably intelligibly negligibly petulantly relevantly tremulously desultorily querulously credulously presidency incredulously preeminently benevolently irrelevancy irrelevantly impenetrably malevolently unintelligibly expressionlessly mellifluously selenography discreditably