df <- data.frame(abc = c(1, 0, 3, 2, 0),
                 foo = c(0, 4, 2, 1, 0),
                 glorx = c(0, 0, 0, 1, 2))

new_col <- c('abc', 'foofoofoofoo', 'abcabcabcfoofoo', 'abcabcfooglorx', 'glorxglorx')
also_acceptable <- c('abc', 'foofoofoofoo', 'abcfooabcfooabc', 'abcfooglorxabc', 'glorxglorx')

df %>% mutate(new_col = new_col, also_acceptable = also_acceptable)