Skepticize is a word that means to doubt or question the validity of something. Its antonyms, on the other hand, are words that mean the exact opposite. To believe, trust, accept, and embrace are some antonyms of skepticize. Other antonyms include approve, agree, endorse, and support. These words signify a level of confidence, trust or acceptance instead of doubt or questioning, which is the meaning of the word skepticize. It is important to know and use the right antonyms in context to convey the intended meaning of a statement or description.