savory vs piquant

savory is a noun but piquant is not a noun.

Word	Noun	Adjective	Verb	Adverb
savory	Yes	Yes	No	No
piquant	No	Yes	No	No

As adjectives, savory and piquant are synonyms defined as:

Other synonyms of savory include savoury, zesty.

savory (noun)	piquant (noun)
either of two aromatic herbs of the mint family
an aromatic or spicy dish served at the end of dinner or as an hors d'oeuvre
any of several aromatic herbs or subshrubs of the genus Satureja having spikes of flowers attractive to bees
dwarf aromatic shrub of Mediterranean regions

savory (adjective)	piquant (adjective)
morally wholesome or acceptable	attracting or delighting
having a pleasant taste	engagingly stimulating or provocative
having an agreeably pungent taste	having an agreeably pungent taste