We don't have synonyms for cantrip yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cantrap, cantraip and lantrip.
"1976: For one thing, I've no intention of distributing cantrips and costly crucifixes to every rapable woman in the Parish of St Magloire. -- Kyril Bonfiglioli, Something Nasty in the Woodshed (Penguin 2001, p. 422)"
"1976: For one thing, I've no intention of distributing cantrips and costly crucifixes to every rapable woman in the Parish of St Magloire. -- Kyril Bonfiglioli, Something Nasty in the Woodshed (Penguin 2001, p. 422)"