Poison is a noun, to poison is a verb
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When you add the suffix -ous to the word "poison," it becomes an adjective - "poisonous."
The word "poison" can be used as a noun or a verb. As a noun, it refers to a substance that causes injury, illness, or death when ingested, inhaled, or absorbed. As a verb, it means to administer poison to someone or something.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
Rhubarb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.