booster vs step rocket

booster and step rocket both are nouns.

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

booster (noun)	step rocket (noun)
an additional dose that makes sure the first dose was effective	a rocket having two or more rocket engines (each with its own fuel) that are fired in succession and jettisoned when the fuel is exhausted
the first stage of a multistage rocket
an amplifier for restoring the strength of a transmitted signal
a thief who steals goods that are in a store
someone who is an active supporter and advocate
a person who backs a politician or a team etc.