Anyway, although, and anyhow are all synonyms for however. Therefore and similarly are antonyms of however. And here are 21 another word for however.
Although, anyhow, anyway, be that as it may, but, even so, having said that, howbeit, in whatever way, natheless, nevertheless, nonetheless, notwithstanding, regardless of how, still and all, still, though, withal, yet, and no matter how are all synonyms for however.
However synonym page has a variety of synonyms that differ in length. 2 synonyms with 3, 11, 13, and 15 letters and 1 synonym with 5, 7, 8, 9, 12, and 14 letters. 5 synonyms with 6 letters. For a total of 19 another word for however.
She loves tea; however, he prefers coffee.
We planned a picnic; however, it rained.
The task seemed easy; however, it wasn't.
She studied hard; however, she still failed.