step rocket vs multistage rocket

step rocket and multistage rocket both are nouns.

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

As nouns, step rocket and multistage rocket are synonyms defined as:

step rocket and multistage rocket: 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

step rocket (noun)	multistage rocket (noun)
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	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