philtre vs philter

philtre and philter both are nouns.

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

As nouns, philtre and philter are synonyms defined as:

philtre and philter: a drink credited with magical power; can make the one who takes it love the one who gave it

Other synonyms of philtre include love-philter, love-philtre, love-potion.

philtre (noun)	philter (noun)
a drink credited with magical power; can make the one who takes it love the one who gave it	a drink credited with magical power; can make the one who takes it love the one who gave it