A word used to describe a noun is an adjective; a word used to describe, or modify, a verb or an adjective is an adverb.
Thick is usually an adjective; thickly would be the adverb form. You look at the usage of a word in a sentence to find its "part of speech."
adverb
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
The part(s) of speech that has an "A" sound are: Adjective and Adverb.
Thick can be an adjective, a noun and an adverb. Adjective: e.g. heavy in build. Noun: The thickest part of something. Adverb: In a thick manner.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.
The part of speech for "buried" is a verb.