No, healthy is an adjective. However, you can make healthy into an adverb by adding -ily. So the adverb would be "healthily."
"Healthily".
No, health is a noun. The adverb form of the adjective healthy is "healthily." (it is seldom used)
The word "well" is the adverb form of the adjective good. Well can also be a noun (water source) or an adjective (healthy).
It is a noun, formed from the adjective healthy+ness.
Yes. Although "well" is the adverb form of the adjective "good," unwell is the opposite of the adjective "well" that means "healthy." Unwell cannot be an adverb: you would use badly or poorly.
Not alone. Young male is two words, an adjective and a noun. It could be part of an adverb phrase, though, such as "The disease would be least dangerous to a healthy young male."
1. Adverb Of Time2. Adverb Of Place3. Adverb Of Manner4. Adverb Of Degree of Quantity5. Adverb Of Frequency6. Interrogative Adverb7. Relative Adverb
"Ever" is an adverb.
Softly is an adverb.
No, it is not an adverb. Truthful is an adjective, and the adverb form is "truthfully."
An adverb phrase is two or more words that act as an adverb. It would be modified by an adverb or another adverb phrase.