march on vs march

march on is not a noun while march is a noun.

Word	Noun	Adjective	Verb	Adverb
march on	No	No	Yes	No
march	Yes	No	Yes	No

march on (noun)	march (noun)
	the act of marching; walking with regular steps (especially in a procession of some kind)
	a steady advance
	genre of music written for marching
	a procession of people walking together
	district consisting of the area on either side of a border or boundary of a country or an area

march on (verb)	march (verb)
move forward, also in the metaphorical sense	lie adjacent to another or share a boundary
	walk fast, with regular or measured steps; walk with a stride
	march in a procession
	walk ostentatiously
	force to march
	cause to march or go at a marching pace
	march in protest; take part in a demonstration