rededicate vs dedicate

rededicate and dedicate both are verbs.

Word	Noun	Adjective	Verb	Adverb
rededicate	No	No	Yes	No
dedicate	No	No	Yes	No

As verbs, dedicate is a hypernym of rededicate; that is, dedicate is a word with a broader meaning than rededicate:

Other hypernyms of rededicate include commit, consecrate, devote, give.

rededicate (verb)	dedicate (verb)
dedicate anew	set apart to sacred uses with solemn rites, of a church
	give entirely to a specific person, activity, or cause
	inscribe or address by way of compliment
	open to public use, as of a highway, park, or building