compatible(harmonious, congruous): Is this software compatible with my computer?
boundary(border, limit): A fence marked the boundary of the woods.
boundless(vast, limitless)
endless(everlasting): The long and boring drive seemed endless.
cohesive
horizontal
bulk: The bulk of this oil tank is about 500 tons.
brim(margin, edge, rim): A bird perched on the brim of the flowerpot.
edge(rim, margin): John is at the edge of death.
rim(edge, border): The horse finally came to a halt on the very rim of the cliff.
brink(margin, edge, rim): A fence was built along the brink of the cliff to prevent accidents.
constituent(component)
dimension(size, proportion): He drew a house in three-dimension.
elasticity
cohesion: Since Bob's paper had no cohesion and merely listed facts, he received a failing grade.
mechanics
pressure: He feels the pressure soon after he takes up the job.
gravity
impetus(urge, momentum): His longing for another kind of life is a major impetus for his hard working.
release(give off, discharge, dismiss, emit): Thousands of balloons were released at the opening ceremony.
decelerate(decrease the speed of, accelerate): Many countries are seeking measures to decelerate the arms buildup.
precipitate: The finest bridge of the city broke and precipitated five travelers into the river below.
expedite(speed up, hasten): The person I talked to on the phone promised to expedite the shipment of the book I ordered.
quiver(shiver, tremble): The dog quivered in the rain.
jar: Her announcement really jarred me. I was shocked.
vibration
discharge(let out, release, liberate): The patient was discharged from the hospital after complete recovery.
shrink(contract, compress, dwindle): Because my shirt had shrunk, I gave it to my younger cousin.
diffuse(scatter, spread): The winds diffused the smoke throughout the neighborhood.
emit(discharge, give off): All the cars that emit poisonous gas have been called back.
transpire(exhale, send out): It was transpired that the king was already dead.
constitute(form, compose, make up): Not telling the whole truth constitutes lying.
eject(emit, ejaculate): The machine ejected finished parts faster than we could count them.
radiate(emit, give off): Heat radiated from the stove.
molecule
ion
electron
neutron
nucleus
proton
atom: An atom is made up of protons, neutrons and one or more electrons.
nuclear
physics
fusion
thermometer
temperature
thaw(melt, defrost): Last week it was so warm that the frozen pond thawed.
centigrade: Centigrade scale is used in most countries except the United States.
clot(gelatinize, congeal): Blood had begun to clot around the gaping wound.
sublimate(elevate, refine): Water are sublimated from the gaseous to the solid state without becoming a liquid.
distillation: Distillation is used to produce very pure water.
chaos(disorder): Chaos broke out when the fire alarm went off.
clutter(litter, disarray): My office is filled with useless clutter.
equilibrium(balance): The gymnast has perfect equilibrium.
density: The population density is very high in Hong Kong.
liquid: The three phases of matter are solid, liquid and gas.
dilute(thin, weaken): As the ice melted, it diluted my drink.
dehydrate: Her body had dehydrated dangerously with the heat.
declivity
foam(bubble, froth)
ventilation(airing, air circulation)
evaporate(vaporize): The rubbing alcohol evaporated as soon as the nurse dabbed it on the patient's arm.
evaporation
thermodynamics
friction: The wheel has been expired due to friction.
attrition(wear and tear)
chafe(rub, scrape): Coarse fabric will chafe your skin.
resonance: The opera singer's voice has very good resonance.
echo
ultrasonics
sonar
accoustic
band(stripe)
charge(fill, replenish)
electricity: static electricity
electromagnet
electromagnetism
electronic: electronic component
electronics
amplifier
battery: dry battery
chip
conductor
insulator
magnet
magnetism
semiconductor
transistor
ultraviolet
microwave
mechanics
gravitation
oscillation
statics
relativity
velocity
dynamics
force
current: direct current; alternating current
accelerate(expedite, speed): The car accelerated as it went downhill.
acceleration
transparent(clear, limpid): The sunset shined through the transparent glass.
opaque
translucent
optical: optical fiber
optics
ray: Gamma rays; infrared rays;X rays
spectrum
wavelength
magnifier
lens
Man cannot discover new oceans unless he has courage to lose sight of the shore.