As nouns the difference between shawm and hawm
is that shawm
is a mediaeval double reed wind instrument with conical wooden body while hawm
As a verb hawm is
(uk|dialect) to lounge; to loiter.
Other Comparisons: What's the difference?
a mediaeval double reed wind instrument with conical wooden body
:* 1985': There are four flutes, a harp of twenty strings, a mournful '''shawm , and a number of drums of oxhide, some to be struck, others spanked. — Anthony Burgess, ''Kingdom of the Wicked
(UK, dialect) To lounge; to loiter.