order Pleuronectiformes vs order Heterosomata

order Pleuronectiformes and order Heterosomata both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Pleuronectiformes	Yes	No	No	No
order Heterosomata	Yes	No	No	No

As nouns, order Pleuronectiformes and order Heterosomata are synonyms defined as:

order Pleuronectiformes and order Heterosomata: flatfishes: halibut; sole; flounder; plaice; turbot; tonguefishes

Other synonyms of order Pleuronectiformes include Heterosomata.

order Pleuronectiformes (noun)	order Heterosomata (noun)
flatfishes: halibut; sole; flounder; plaice; turbot; tonguefishes	flatfishes: halibut; sole; flounder; plaice; turbot; tonguefishes