We don't have synonyms for home guard yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are horse guard, nose guard and home guards.
(n) :
(military, historical) An armed citizen defence force supporting the British Army during the Second World War, in particular, defence against any invasion by enemy forces.
(n) :
(military, historical) An armed citizen defence force supporting the British Army during the Second World War, in particular, defence against any invasion by enemy forces.