viroid vs virusoid

viroid and virusoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
viroid	Yes	No	No	No
virusoid	Yes	No	No	No

As nouns, viroid and virusoid are synonyms defined as:

viroid and virusoid: the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat

viroid (noun)	virusoid (noun)
the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat	the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat