Synonyms for Seasoned:

adj.

•adult (adjective)
mature.
•experienced (adjective)
practiced, trained, veteran, knowledgeable, matured, qualified.

n.

bittersweet, chocolate, chocolatey, acid, bitter, brackish, fiery, acidic, astringent. knowledgeable, versed, trained, practiced, learned, scholarly, qualified, knowing the ropes, worldly-wise, intellectual, well-read, educated, ability, old, literate. •experienced (noun)
able, mature, settled, established.
•seasoned (noun)
flavored, tasteful, veteran, cured, experienced, flavoured.
•spicy (noun)
sharp, salty, tangy, aromatic, spicy.

v.

•aged (verb)
Declined, grown old, developed, matured, Deteriorated, aged, mellowed, Lasted, grew old, Endured, ripened.

Other synonyms:

spicy. versed. practiced. old. •Other relevant words:
qualified, cured, brackish, practiced, aromatic, trained, chocolate, ability, fiery, bitter, veteran, educated, settled, worldly-wise, tangy, literate, mature, tasteful, chocolatey, able, spicy, acidic, well-read, astringent, salty, scholarly, intellectual, old, learned, versed, established, bittersweet, knowledgeable, sharp, acid, experienced, flavoured, knowing the ropes, flavored.

Usage examples for seasoned

1. They were also loath to bring seasoned slaves from the Caribbean. – The Black Experience in America The Immigrant Heritage of America by Norman Coombs

2. The speech is to be " seasoned with salt." – The Expositor's Bible: Colossians and Philemon by Alexander Maclaren