soapbox vs rostrum

soapbox and rostrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
soapbox	Yes	No	No	No
rostrum	Yes	No	No	No

As nouns, soapbox and rostrum are synonyms defined as:

soapbox and rostrum: a platform raised above the surrounding level to give prominence to the person on it

Other synonyms of soapbox include ambo, dais, podium, pulpit, stump.

soapbox (noun)	rostrum (noun)
a platform raised above the surrounding level to give prominence to the person on it	beaklike projection of the anterior part of the head of certain insects such as e.g. weevils
a crate for packing soap	a platform raised above the surrounding level to give prominence to the person on it