On end or upright.

synoniem: endways.

Roget 212: vertically etc. adj.; up, on end; up on end, right on end; a plomb [Fr.], endwise; one one's legs; at right angles.   

In or toward the direction of the ends; lengthwise.

synoniem: endways.

With the end forward or toward the observer.

synoniemen: end on, endways.