harmonic vs harmonics

harmonic and harmonics both are nouns.

Word	Noun	Adjective	Verb	Adverb
harmonic	Yes	Yes	No	No
harmonics	Yes	No	No	No

harmonic (noun)	harmonics (noun)
any of a series of musical tones whose frequencies are integral multiples of the frequency of a fundamental	the study of musical sound
a tone that is a component of a complex sound

harmonic (adjective)	harmonics (adjective)
of or relating to harmony as distinct from melody and rhythm
of or relating to the branch of acoustics that studies the composition of musical sounds
of or relating to harmonics
involving or characterized by harmony
relating to vibrations that occur as a result of vibrations in a nearby body