demonic — Demonic means coming from or belonging to a demon or being like a demon.
gnomonic — of or relating to a gnomon or to a sundial.
harmonic — pertaining to harmony, as distinguished from melody and rhythm.
hedonic — of, characterizing, or pertaining to pleasure: a hedonic thrill.
ionic — Architecture. noting or pertaining to one of the five classical orders that in ancient Greece consisted of a fluted column with a molded base and a capital composed of four volutes, usually parallel to the architrave with a pulvinus connecting a pair on each side of the column, and an entablature typically consisting of an architrave of three fascias, a richly ornamented frieze, and a cornice corbeled out on egg-and-dart and dentil moldings, with the frieze sometimes omitted. Roman and Renaissance examples are often more elaborate, and usually set the volutes of the capitals at 45° to the architrave. Compare composite (def 3), Corinthian (def 2), Doric (def 3), Tuscan (def 2).
ironic — using words to convey a meaning that is the opposite of its literal meaning; containing or exemplifying irony: an ironic novel; an ironic remark.
laconic — using few words; expressing much in few words; concise: a laconic reply.
miltonic — of or relating to the poet Milton or his writings.
mnemonic — assisting or intended to assist the memory.
planktonic — the aggregate of passively floating, drifting, or somewhat motile organisms occurring in a body of water, primarily comprising microscopic algae and protozoa.
platonic — of, relating to, or characteristic of Plato or his doctrines: the Platonic philosophy of ideal forms.
plutonic — noting or pertaining to a class of igneous rocks that have solidified far below the earth's surface.
pneumonic — of, relating to, or affecting the lungs; pulmonary.
sardonic — characterized by bitter or scornful derision; mocking; cynical; sneering: a sardonic grin.
symphonic — Music. of, for, pertaining to, or having the character of a symphony or symphony orchestra.
synchronic — having reference to the facts of a linguistic system as it exists at one point in time without reference to its history: synchronic analysis; synchronic dialectology.
tectonic — of or relating to building or construction; constructive; architectural.
Four-or-more syllable rhymes
allophonic — any of the members of a class of speech sounds that, taken together, are commonly felt to be a phoneme, as the t- sounds of toe, stow, tree, hatpin, catcall, cats, catnip, button, metal, city; a speech sound constituting one of the phonetic manifestations or variants of a particular phoneme.
avionic — Of, or relating to avionics (aviation electronics).
catatonic — If you describe someone as being in a catatonic state, you mean that they are not moving or responding at all, usually as a result of illness, shock, or drugs.
diatonic — of, relating to, or based upon any scale of five tones and two semitones produced by playing the white keys of a keyboard instrument, esp the natural major or minor scales forming the basis of the key system in Western music
electronic — (of a device) Having or operating with the aid of many small components, esp. microchips and transistors, that control and direct an electric current.
hyaluronic — Of or pertaining to hyaluronic acid or its derivatives.
hydroponic — the cultivation of plants by placing the roots in liquid nutrient solutions rather than in soil; soilless growth of plants. Compare aeroculture, geoponics (def 2).
hypersonic — noting or pertaining to speed that is at least five times that of sound in the same medium.
hypertonic — Physiology. of or relating to hypertonia.
isotonic — Also, isosmotic. Physical Chemistry. noting or pertaining to solutions characterized by equal osmotic pressure. Compare hypertonic (def 2), hypotonic (def 2).
nucleonic — a proton or neutron, especially when considered as a component of a nucleus.
pharaonic — (sometimes lowercase) of or like a Pharaoh: living in Pharaonic splendor.
philharmonic — fond of or devoted to music; music-loving: used especially in the name of certain musical societies that sponsor symphony orchestras (Philharmonic Societies) and hence applied to their concerts (philharmonic concerts)
supersonic — greater than the speed of sound waves through air.
telephonic — of, relating to, or happening by means of a telephone system.
ultrasonic — of, relating to, or utilizing ultrasound.
Four-or-more syllable rhymes
isoelectronic — noting or pertaining to atoms and ions having an equal number of electrons.
napoleonic — pertaining to, resembling, or suggestive of Napoleon I, or, less often, Napoleon III, or their dynasty: the Napoleonic era; a Napoleonic attitude toward one's employees.
neoplatonic — a philosophical system, originated in the 3rd century a.d. by Plotinus, founded chiefly on Platonic doctrine and Eastern mysticism, with later influences from Christianity. It holds that all existence consists of emanations from the One with whom the soul may be reunited.
Four-or-more syllable rhymes
microelectronics — the technology dealing with the design, development, and construction of electronic systems utilizing extremely small elements, especially solid-state devices employing microminiaturization.
