drive vs get across

drive is a noun but get across is not a noun.

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

As verbs, get across is a hypernym of drive; that is, get across is a word with a broader meaning than drive:

Other hypernyms of drive include cover, cross, cut across, cut through, get over, pass over, track, traverse.

drive (noun)	get across (noun)
a journey in a vehicle (usually an automobile)
a series of actions advancing a principle or tending toward a particular end
hitting a golf ball off of a tee with a driver
the act of applying force to propel something
(sports) a hard straight return (as in tennis or squash)
the act of driving a herd of animals overland
a wide scenic road planted with trees
a road leading up to a private house
a mechanism by which force or power is transmitted in a machine
(computer science) a device that writes data onto or reads data from a storage medium
the trait of being highly motivated
a physiological state corresponding to a strong need or desire

drive (verb)	get across (verb)
move into a desired direction of discourse	become clear or enter one's consciousness or emotions
(hunting) chase from cover into more open ground	communicate successfully
(hunting) search for game	travel across or pass over
cause to function by supplying the force or power for or by controlling
force into or from an action or state, either physically or metaphorically
cause to move rapidly by striking or throwing with force
hit very hard, as by swinging a bat horizontally
strike with a driver, as in teeing off
excavate horizontally
push, propel, or press with force
cause to move back by force or influence
compel somebody to do something, often against his own will or judgment
travel or be transported in a vehicle
operate or control a vehicle
cause someone or something to move by driving
move by being propelled by a force
urge forward
proceed along in a vehicle
strive and make an effort to reach a goal
to compel or force or urge relentlessly or exert coercive pressure on, or motivate strongly
work as a driver
have certain properties when driven