blastoff vs rocket launching

blastoff and rocket launching both are nouns.

Word	Noun	Adjective	Verb	Adverb
blastoff	Yes	No	No	No
rocket launching	Yes	No	No	No

As nouns, rocket launching is a hypernym of blastoff; that is, rocket launching is a word with a broader meaning than blastoff:

blastoff: the launching of a missile or spacecraft to a specified destination
rocket launching: the launching of a rocket or missile under its own power

Other hypernyms of blastoff include rocket firing.

blastoff (noun)	rocket launching (noun)
the launching of a missile or spacecraft to a specified destination	the launching of a rocket or missile under its own power