order Podicipediformes vs order Colymbiformes

order Podicipediformes and order Colymbiformes both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Podicipediformes	Yes	No	No	No
order Colymbiformes	Yes	No	No	No

As nouns, order Podicipediformes and order Colymbiformes are synonyms defined as:

Other synonyms of order Podicipediformes include Colymbiformes, order Podicipitiformes, Podicipediformes, Podicipitiformes.

order Podicipediformes (noun)	order Colymbiformes (noun)
grebes	grebes