order Rickettsiales vs Rickettsiales

order Rickettsiales and Rickettsiales both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Rickettsiales	Yes	No	No	No
Rickettsiales	Yes	No	No	No

As nouns, order Rickettsiales and Rickettsiales are synonyms defined as:

order Rickettsiales and Rickettsiales: pleomorphic Gram-negative microorganisms

order Rickettsiales (noun)	Rickettsiales (noun)
pleomorphic Gram-negative microorganisms	pleomorphic Gram-negative microorganisms