order Pleuronectiformes vs Heterosomata

order Pleuronectiformes and Heterosomata both are nouns.

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

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

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

Other synonyms of order Pleuronectiformes include order Heterosomata.

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