get down vs commence

get down and commence both are verbs.

Word	Noun	Adjective	Verb	Adverb
get down	No	No	Yes	No
commence	No	No	Yes	No

As verbs, get down and commence are synonyms defined as:

get down and commence: take the first step or steps in carrying out an action

Other synonyms of get down include begin, get, set about, set out, start, start out.

get down (verb)	commence (verb)
take the first step or steps in carrying out an action	take the first step or steps in carrying out an action
put down in writing; of texts, musical compositions, etc.	set in motion, cause to start
pass through the esophagus as part of eating or drinking	get off the ground
lower someone's spirits; make downhearted
move something or somebody to a lower position
alight from (a horse)
lower (one's body) as by kneeling