Antonyms are words that are opposite in meaning to a given word. The word "necessitousness" refers to the state of being in need or lacking in basic necessities. Some antonyms for this word could include words such as abundance, plenty, luxury, comfort, and affluence. These words all imply a state of having more than enough, rather than lacking something essential. Other possible antonyms for necessitousness could include self-sufficiency, independence, self-reliance, and resourcefulness. These words suggest a state of being able to provide for oneself and to not require outside assistance or support.