different between nunnery vs gunnery

English

From Middle English nonnery, nonnerie, equivalent to nun +? -ery.

nunnery (plural nunneries)

(archaic) a place of residence for nuns; a convent
(slang, obsolete) a brothel
- 1601: Shakespeare, Hamlet III.i
  Get thee to a nunnery, why wouldst thou be a breeder of sinners?

gun +? -ery

gunnery (usually uncountable, plural gunneries)

(uncountable) The science of guns and gunfire including aspects of bullet flight and impact.
(uncountable) The design and manufacture of guns, particularly those of a large caliber.
(uncountable) The firing of guns
- 1920, Wilfred Owen, "Exposure" in Poems, London: Chatto & Windus, p. 18, [1]
  Northward incessantly, the flickering gunnery rumbles, / Far off, like a dull rumour of some other war.
- 1973, Jaroslav Hašek, The Good Soldier Švejk, translated by Cecil Parrott, London: William Heinemann, Chapter 5, p. 438,
  The 12th march company telephoned claiming that someone in the office had heard that they were waiting to do some shooting practice at moveable targets and that they would only leave after gunnery practice under front conditions.
(countable) A place where guns are tested, or where people are trained in their use

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