verse should probably be made a tag synonym of poetry. There are currently only two questions tagged with verse one of which is also tagged with poetry.
It is probably also difficult to correctly use verse; it is somewhat similar to technique (or perhaps more accurately, 'mechanics'--which does not seem to be a tag) in being somewhat vague.
(Technically, I feel 'verse' should refer to the technical aspect, the 'mechanics' such as meter and rhyme. The wiki summary for poetry has "including poetry formatting and technique"; while mechanics are only a part of technique [which would also include imagery, sound-associations, and word play], it may be best not to make a separation.)