soft tick vs argasid

soft tick and argasid both are nouns.

Word	Noun	Adjective	Verb	Adverb
soft tick	Yes	No	No	No
argasid	Yes	No	No	No

As nouns, soft tick and argasid are synonyms defined as:

soft tick and argasid: tick lacking a dorsal shield and having mouth parts on the under side of the head

soft tick (noun)	argasid (noun)
tick lacking a dorsal shield and having mouth parts on the under side of the head	tick lacking a dorsal shield and having mouth parts on the under side of the head