yes
No, a word cannot be two parts of speech at the same time. A word has a specific part of speech based on its function in a sentence, such as noun, verb, adjective, etc.
The word "tropical" can function as an adjective.
The part of speech for this particular word is a noun.
The word "appropriate" can function as both an adjective and a verb.
The word "trudges" is a verb.
There are no sentences that have no parts of speech. Every word in a sentence is classified as a part of speech, such as nouns, verbs, adjectives, etc.
Tropical in parts of speech
The word "tropical" can function as an adjective.
The part of speech for this particular word is a noun.
a pronoun
Ropnoun
The word him is a pronoun.
Ropnoun
The word him is a pronoun.
The word "appropriate" can function as both an adjective and a verb.
there is one part of speech in the word up.
The part of speech for this particular word is a noun.
The word "trudges" is a verb.