pass over vs tramp

pass over is not a noun while tramp is a noun.

Word	Noun	Adjective	Verb	Adverb
pass over	No	No	Yes	No
tramp	Yes	No	Yes	No

As verbs, tramp is a hyponym of pass over; that is, tramp is a word with a more specific, narrower meaning than pass over:

Other hyponyms of pass over include walk, crisscross, ford, bridge, jaywalk, drive, take, course, hop.

pass over (noun)	tramp (noun)
	a long walk usually for exercise or pleasure
	a commercial steamer for hire; one having no regular schedule
	a heavy footfall
	a vagrant
	a person who engages freely in promiscuous sex
	a foot traveler; someone who goes on an extended walk (for pleasure)

pass over (verb)	tramp (verb)
bypass	travel on foot, especially on a walking expedition
rub with a circular motion	walk heavily and firmly, as when weary, or through mud
travel across or pass over	move about aimlessly or without any destination, often in search of food or employment
make a passage or journey from one place to another	cross on foot
fly over