parasiticidal vs helminthic

parasiticidal is not a noun while helminthic is a noun.

Word	Noun	Adjective	Verb	Adverb
parasiticidal	No	Yes	No	No
helminthic	Yes	Yes	No	No

As adjectives, parasiticidal and helminthic are synonyms defined as:

parasiticidal and helminthic: capable of expelling or destroying parasitic worms

Other synonyms of parasiticidal include anthelminthic, anthelmintic.

parasiticidal (noun)	helminthic (noun)
	a medication capable of causing the evacuation of parasitic intestinal worms

parasiticidal (adjective)	helminthic (adjective)
capable of expelling or destroying parasitic worms	capable of expelling or destroying parasitic worms