order Podicipitiformes vs order Colymbiformes

order Podicipitiformes and order Colymbiformes both are nouns.

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

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

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

order Podicipitiformes (noun)	order Colymbiformes (noun)
grebes	grebes