· osmosis
Microbiology, meteorology and molecule are science words.
Radiation and radon are science words. They begin with the letter r.
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.
oh
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organicosmosisoxygen
omnipotent
Uranium and ultraviolet rays are science words. They begin with the letter u.
Development studies, which is a kind of science.