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