Blend of guitar +‎ harmony.

• IPA^(key): /ɡəˈtɑː(ɹ)məni/
• Rhymes: -ɑː(ɹ)məni

guitarmony (plural guitarmonies)

1. (music) A harmonised melody played on guitar.
   • 2003 November 21, Todd LaRoc, “The need for speed”, in alt.guitar.beginner‎^[1] (Usenet):

     The best thing to do is this: get a variable speed tape recorder. Slow down your favorite solos. Play along with them slowly. The pitch will be lower but don't worry about that - match the pace and the rhythm and think of it as a Guitarmony.

   • 2004, CMJ New Music Monthly, page 32:

     Grooved-out guitarmonies, blustering syncopations from two of indie rock's better drummers, and a subtle sense of humor on tracks like "Doing Research For An Autobiography" are the main attraction, and fans of either band should be able to spot their heroes under the surface.

   • 2009 June, SPIN, page 92:

     Starting in the late '60s as the Sweetshop, they nicked from Jeff Lynne-era Move (whose "Do Ya" was a template), but their layered vocals, clever guitarmonies, and feathered hairstyles influenced Queen and Def Leppard, among many others.