different between deletery vs deleters

English

deletery (plural deleteries)

(obsolete) That which destroys.
- 1660, Jeremy Taylor, Ductor Dubitantium, or the Rule of Conscience
  They [the Scriptures] are […] the only deletery of heresies.

deletery (comparative more deletery, superlative most deletery)

(obsolete) Destructive, poisonous, deleterious.
- 1663, Samuel Butler, Hudibras, part 1, canto 2
  Nor engine, nor device polemic, / Disease, nor doctor epidemic, / Tho' stored with deletery med'cines, / Which whosoever took is dead since, / E'er sent so vast a colony / To both the under worlds as he.

deleters

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