Use
.one-word-per-line {
word-spacing: <parent-width>;
}
.your-classname{
width: min-intrinsic;
width: -webkit-min-content;
width: -moz-min-content;
width: min-content;
display: table-caption;
display: -ms-grid;
-ms-grid-columns: min-content;
}
where <parent-width>
is the width of the parent element (or an arbitrary high value that doesn’t fit into one line). That way you can be sure that there is even a line-break after a single letter. Works with Chrome/FF/Opera/IE7+ (and probably even IE6 since it’s supporting word-spacing as well).