Modernity rhymes with:
eternity, fraternity, affinity, alkalinity, amenity, community, conaty, dignity, disunity, divinity, eternity, femininity, fraternity, gaynatie, immunity, indemnity, indignity, infinity, inhumanity, insanity, masculinity, mcginnity, opportunity, profanity, salinity, sanity, serenity, solemnity, trinity, unity, vanity, vicinity
Modernity sounds like:
maternity, metromedia, mitterand, mitterrand