recede vs fall behind

recede and fall behind both are verbs.

Word	Noun	Adjective	Verb	Adverb
recede	No	No	Yes	No
fall behind	No	No	Yes	No

As verbs, recede and fall behind are synonyms defined as:

Other synonyms of recede include drop off, fall back.

recede (verb)	fall behind (verb)
become faint or more distant	retreat
retreat	hang (back) or fall (behind) in movement, progress, development, etc.
pull back or move away or backward