Is tasted an adjective

No, the Word 'tasted' is not a noun.

The Word 'tasted' is the past participle, past tense of the verb to taste. The past participle of the verb also functions as an adjective.

Examples:

We tasted all of the candy sample. (verb)

I liked two of the tasted samples. (adjective)

The noun forms of the verb to taste are taster and the gerund, tasting.

The Word 'taste' is also a noun, a common noun; a general Word for a sensation obtained from a substance in the mouth; a general Word for a person's tendency to like and dislike certain things.