SECTION I. EXISTENCE
Being, in the abstract
Existence– N. existence, being, entity, ens, esse, subsistence, quiddity. reality, realness, actuality; positiveness &c.
Inexistence– N. inexistence; non-existence, -subsistence; nonentity, nil; negativeness &c.
From Thesaurus of Words and Phrases by Peter Mark Roget, M.D., F.R.S. Enlarged by John Lewis Roget, M.A., New Edition Revised and Enlarged by Samuel Romily Roget, M.A. Published by Grosset & Dunlap, the edition is copyright 1941, 1947.