get behind vs drop behind

get behind and drop behind both are verbs.

Word	Noun	Adjective	Verb	Adverb
get behind	No	No	Yes	No
drop behind	No	No	Yes	No

As verbs, get behind and drop behind are synonyms defined as:

Other synonyms of get behind include drag, drop back, hang back, trail.

get behind (verb)	drop behind (verb)
to lag or linger behind	to lag or linger behind