horse tick vs Hippobosca equina

horse tick and Hippobosca equina both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse tick	Yes	No	No	No
Hippobosca equina	Yes	No	No	No

As nouns, horse tick and Hippobosca equina are synonyms defined as:

Other synonyms of horse tick include horsefly.

horse tick (noun)	Hippobosca equina (noun)
winged fly parasitic on horses	winged fly parasitic on horses