atomic (adj.)
- an
- any
- atomistic
- corpuscular
- cyclic
- diatomic
- either
- embryonic
- evanescent
- exclusive
- germinal
- granular
- heterocyclic
- homocyclic
- impalpable
- imperceptible
- imponderable
- inappreciable
- indiscernible
- individual
- indivisible
- infinitesimal
- intangible
- integral
- invisible
- irreducible
- isocyclic
- isotopic
- lone
- microcosmic
- microscopic
- molecular
- monatomic
- monistic
- one
- simple
- single
- singular
- sole
- solid
- solitary
- subatomic
- tenuous
- thin
- ultramicroscopic
- unanalyzable
- undivided
- uniform
- unique
- unitary
- unseeable
- whole