The chemical symbol for carbon dioxide is shown as
CO_2 to represent subscript 2.
In the following compound words, the hyphen was
removed to conform to majority use in text:
exhaust-blast exhaust blast
jet-motors jet motors
jet-planes jet planes
pilot-gyros pilot gyros
space-travel space travel
wing-flaps wing flaps
The following compounds, with and without a hyphen, were
left as found because of equal prevalence of both forms:
blood-stained bloodstained
wood-blocks wood blocks
One compound was split since joined it suggested an
inapposite meaning:
cherrystone cherry stone
A host of compounds were left both hyphenated and separate
depending on their part of speech, for example:
science-fiction science fiction
(adjective) (noun)
One typo was corrected:
spendid splendid