philter vs potion

philter and potion both are nouns.

Word	Noun	Adjective	Verb	Adverb
philter	Yes	No	No	No
potion	Yes	No	No	No

As nouns, potion is a hypernym of philter; that is, potion is a word with a broader meaning than philter:

philter: a drink credited with magical power; can make the one who takes it love the one who gave it
potion: a medicinal or magical or poisonous beverage

philter (noun)	potion (noun)
a drink credited with magical power; can make the one who takes it love the one who gave it	a medicinal or magical or poisonous beverage