enter vs get on

enter and get on both are verbs.

Word	Noun	Adjective	Verb	Adverb
enter	No	No	Yes	No
get on	No	No	Yes	No

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

enter (verb)	get on (verb)
set out on (an enterprise or subject of study)	develop in a positive way
make a record of; set down in permanent form	appear in a show, on T.V. or radio
become a participant; be involved in	grow old or older
put or introduce into something	get up on the back of
come on stage	grow late or (of time) elapse
to come or go into	get on board of (trains, buses, ships, aircraft, etc.)
take on duties or office	have smooth relations
register formally as a participant or member
be or play a part of or in