march vs adjoin

march is a noun but adjoin is not a noun.

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

As verbs, march and adjoin are synonyms defined as:

Other synonyms of march include abut, border, butt, butt against, butt on, edge.

As verbs, adjoin is a hypernym of march; that is, adjoin is a word with a broader meaning than march:

Other hypernyms of march include contact, meet, touch.

march (noun)	adjoin (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 (verb)	adjoin (verb)
lie adjacent to another or share a boundary	attach or add
walk fast, with regular or measured steps; walk with a stride	lie adjacent to another or share a boundary
march in a procession	be in direct physical contact with; make contact
walk ostentatiously
force to march
cause to march or go at a marching pace
march in protest; take part in a demonstration