accompany变为名词是companion。companion的意思是旅伴，伴侣，陪伴，（爱好、志趣等相投的）伙伴，同伴，同甘共苦的伙伴。companion的例句：He was a charming travelling companion（他是个讨人喜欢的旅伴）。

companion的例句：She and he were congenial companion in youth（他和她是竹马青梅，志趣相投）；We become companion in misfortune from then on（从那时起，我们就成了患难之交）。