1. Relating to harmony or music; concordant; consonant. Harmonic triad, the common chord, or the chord of a note consisting of its third and perfect fifth.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• garmonical,
• barmonical,
• narmonical,
• jarmonical,
• uarmonical,
• yarmonical,
• hzrmonical,
• hsrmonical,
• hwrmonical,
• hqrmonical,
• haemonical,
• hadmonical,
• hafmonical,
• hatmonical,
• harmonikal,
• harmonically,
• harmonicle,
• harmonicale,
• harmoniacal,
• harmoniecal

• harmonized,
• harmonious,
• harmoniser,
• hormonal,
• harmonizer,
• harmonic law,
• harmonic mean,
• harriman,
• harmonizable,
• harmonised,
• harmonically,
• harmonization,
• harmonize,
• Harryman,
• harmonic,
• harmonisation,
• harmonics,
• harmonium,
• harmoniously,
• harmony,
• harmonise,
• harmonica.

The adjective form of the word "harmonical" is "harmonic".

The plural form of the word "harmonical" is "harmonicals".

The singular form of the word "harmonical" is "harmonica"