· osmosis
Radiation and radon are science words. They begin with the letter r.
Microbiology, meteorology and molecule are science words.
Outstanding and optimistic are positive words. They begin with the letter o.
· watt
experiments
Orbit and ozone are space words. They begin with the letter o.
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oh
omnipotent
organicosmosisoxygen
Uranium and ultraviolet rays are science words. They begin with the letter u.
Development studies, which is a kind of science.