leave vs get off

leave is a noun but get off is not a noun.

Word	Noun	Adjective	Verb	Adverb
leave	Yes	No	Yes	No
get off	No	No	Yes	No

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

Other hyponyms of leave include depart, go, go away, pop out, file out, hop out, fall out, step out, eject, undock, log off, log out.

leave (noun)	get off (noun)
the act of departing politely
permission to do something
the period of time during which you are absent from work or duty

leave (verb)	get off (verb)
leave unchanged or undisturbed or refrain from taking	escape potentially unpleasant consequences; get away with a forbidden action
be survived by after one's death	cause to be acquitted; get off the hook; in a legal case
leave behind unintentionally	deliver verbally
go and leave behind, either intentionally or by neglect or forgetfulness	transfer
move out of or depart from	get high, stoned, or drugged
go away from a place	send via the postal service
leave or give by will after one's death	alight from (a horse)
transmit (knowledge or skills)	get out of quickly
put into the care or protection of someone	leave a vehicle, aircraft, etc.
remove oneself from an association with or participation in	enjoy in a sexual way
produce as a result or residue	be relieved of one's duties temporarily
make a possibility or provide opportunity for; permit to be attainable or cause to remain
act or be so as to become in a specified state
have left or have as a remainder