hang back vs dawdle

hang back and dawdle both are verbs.

Word	Noun	Adjective	Verb	Adverb
hang back	No	No	Yes	No
dawdle	No	No	Yes	No

As verbs, dawdle is a hypernym of hang back; that is, dawdle is a word with a broader meaning than hang back:

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

Other hypernyms of hang back include fall back, fall behind, lag.

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