fall behind vs dawdle

fall behind and dawdle both are verbs.

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

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

fall behind and dawdle: hang (back) or fall (behind) in movement, progress, development, etc.

Other synonyms of fall behind include fall back, lag.

fall behind (verb)	dawdle (verb)
retreat	take one's time; proceed slowly
hang (back) or fall (behind) in movement, progress, development, etc.	hang (back) or fall (behind) in movement, progress, development, etc.
	waste time