Synonyms of the word

subatomic

• adj. (physics) Relating to particles that are constituents of the atom, or are smaller than an atom; such as…
• adj. Relating to any length or mass that is smaller in scale than a the diameter of a hydrogen atom.

matter

• n. Substance, material.
• n. A condition, subject or affair, especially one of concern.
• n. An approximate amount or extent.
• n. (obsolete) The essence; the pith; the embodiment.
• n. (obsolete) Inducing cause or reason, especially of anything disagreeable or distressing.
• n. (dated) Pus.
• v. (intransitive) To be important.
• v. (transitive, obsolete outside dialects) To care about, to mind; to find important.
• v. To form pus or matter, as an abscess; to maturate.

microscopic

• adj. Of, or relating to microscopes or microscopy; microscopal.
• adj. So small that it can only be seen using a microscope.
• adj. Very small; minute.
• adj. Carried out with great attention to detail.
• adj. Able to see extremely minute objects.

microscopical

• adj. microscopic (all senses).

substance

• n. Physical matter; material.
• n. The essential part of anything; the most vital part.
• n. Substantiality; solidity; firmness.
• n. Material possessions; estate; property; resources.
• n. A form of matter that has constant chemical composition and characteristic properties.
• n. Drugs (illegal narcotics).
• n. (theology) Hypostasis.