overtone vs plural

overtone and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
overtone	Yes	No	No	No
plural	Yes	Yes	No	No

overtone (noun)	plural (noun)
a harmonic with a frequency that is a multiple of the fundamental frequency	the form of a word that is used to denote more than one
(usually plural) an ulterior implicit meaning or quality

overtone (adjective)	plural (adjective)
	grammatical number category referring to two or more items or units
	composed of more than one member, set, or kind