Synonyms of irrelevancy

1 Syllable

note

2 Syllables

rambling, detour, tangent, drifting

3 Syllables

variation, deflection, excursus, wandering, deviation, discursion, aside, footnote, incident, excursion, diversion

4 Syllables

divergence, apostrophe, episode, divergency, parentheses, divagation, departure, difference, parenthesis