Heterosomata vs order Pleuronectiformes

Heterosomata and order Pleuronectiformes both are nouns.

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

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

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

Other synonyms of Heterosomata include order Heterosomata.

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