Trichinella spiralis vs trichina

Trichinella spiralis and trichina both are nouns.

Word	Noun	Adjective	Verb	Adverb
Trichinella spiralis	Yes	No	No	No
trichina	Yes	No	No	No

As nouns, Trichinella spiralis and trichina are synonyms defined as:

Trichinella spiralis and trichina: parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles

Trichinella spiralis (noun)	trichina (noun)
parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles	parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles