enharmonic
adjective
en·har·mon·ic ˌen-(ˌ)här-ˈmä-nik 
: of, relating to, or being notes that are written differently (such as A flat and G sharp) but sound the same in the tempered scale
enharmonically
ˌen-(ˌ)här-ˈmä-ni-k(ə-)lē
adverb 
Example Sentences
Recent Examples on the Web Aural anticipation of solid resolution instead opens out as the grammar reorients around the enharmonic change of perspective. 
BostonGlobe.com, 3 May 2018 Such enharmonic transfers often are incorporated into dominant-seventh chords, among the more unstable harmonies in traditional tonal practice. BostonGlobe.com, 3 May 2018 Even more beguiling is Harris’s use of enharmonic tones — exploiting how the same pitch can be notated as, say, G-flat or F-sharp, with different harmonic implications for each. BostonGlobe.com, 3 May 2018 Coltrane’s playing has always been aggressive and jarring, but the dissonance and enharmonic experimentation on Interstellar Space is otherworldly. Zach Graham, GQ, 17 July 2017 Both Thundercat’s 2011 album The Golden Age of the Apocalypse and his 2017 album Drunk take Coltrane-scale work and melt it into puddles of enharmonic bliss with profound authority. Zach Graham, GQ, 17 July 2017
BostonGlobe.com, 3 May 2018 Such enharmonic transfers often are incorporated into dominant-seventh chords, among the more unstable harmonies in traditional tonal practice. BostonGlobe.com, 3 May 2018 Even more beguiling is Harris’s use of enharmonic tones — exploiting how the same pitch can be notated as, say, G-flat or F-sharp, with different harmonic implications for each. BostonGlobe.com, 3 May 2018 Coltrane’s playing has always been aggressive and jarring, but the dissonance and enharmonic experimentation on Interstellar Space is otherworldly. Zach Graham, GQ, 17 July 2017 Both Thundercat’s 2011 album The Golden Age of the Apocalypse and his 2017 album Drunk take Coltrane-scale work and melt it into puddles of enharmonic bliss with profound authority. Zach Graham, GQ, 17 July 2017 Word History
Etymology
French enharmonique, from Middle French, of a scale employing quarter tones, from Greek enarmonios, from en in + harmonia harmony, scale
First Known Use
1794, in the meaning defined above