idiom vs frontward

idiom is a noun but frontward is not a noun.

Word	Noun	Adjective	Verb	Adverb
idiom	Yes	No	No	No
frontward	No	No	No	Yes

idiom (noun)	frontward (noun)
the style of a particular artist or school or movement
the usage or vocabulary that is characteristic of a specific group of people
an expression whose meanings cannot be inferred from the meanings of the words that make it up
a manner of speaking that is natural to native speakers of a language

idiom (adverb)	frontward (adverb)
	at or to or toward the front; forward