Offbeam usually refers to something that is incorrect or inaccurate in nature. Therefore, antonyms for this word would be those that signify correctness and accuracy. Some suitable antonyms for offbeam could be accurate, precise, on target, on point, on track, correct, true, valid, proper, and right. These words convey the meaning of being exact or fitting, which is the opposite of being offbeam. Synonyms for the word "offbeam," on the other hand, include words like wrong, erroneous, inaccurate, misguided, false, incorrect, and mistaken. By knowing the antonyms for offbeam, we can better understand the importance of accuracy and precision in various contexts of life.