get across vs hop

get across is not a noun while hop is a noun.

Word	Noun	Adjective	Verb	Adverb
get across	No	No	Yes	No
hop	Yes	No	Yes	No

As verbs, hop is a hyponym of get across; that is, hop is a word with a more specific, narrower meaning than get across:

Other hyponyms of get across include tramp, walk, crisscross, ford, bridge, jaywalk, drive, take, course.

get across (noun)	hop (noun)
	the act of hopping; jumping upward or forward (especially on one foot)
	an informal dance where popular music is played
	twining perennials having cordate leaves and flowers arranged in conelike spikes; the dried flowers of this plant are used in brewing to add the characteristic bitter taste to beer

get across (verb)	hop (verb)
become clear or enter one's consciousness or emotions	jump lightly
communicate successfully	make a jump forward or upward
travel across or pass over	jump across
	traverse as if by a short airplane trip
	move quickly from one place to another
	travel by means of an aircraft, bus, etc.