takeoff rocket vs booster rocket

takeoff rocket and booster rocket both are nouns.

Word	Noun	Adjective	Verb	Adverb
takeoff rocket	Yes	No	No	No
booster rocket	Yes	No	No	No

As nouns, takeoff rocket and booster rocket are synonyms defined as:

takeoff rocket and booster rocket: the first stage of a multistage rocket

Other synonyms of takeoff rocket include booster, booster unit, takeoff booster.

takeoff rocket (noun)	booster rocket (noun)
the first stage of a multistage rocket	the first stage of a multistage rocket