get on vs embark

get on and embark both are verbs.

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

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

Other hyponyms of get on include ship, entrain, catch.

get on (verb)	embark (verb)
develop in a positive way	set out on (an enterprise or subject of study)
appear in a show, on T.V. or radio	go on board
grow old or older	proceed somewhere despite the risk of possible dangers
get up on the back of
grow late or (of time) elapse
get on board of (trains, buses, ships, aircraft, etc.)
have smooth relations