Transatlantic
A beneficiary
The word "an" will correctly complete the analogy. "Shock" is an adjective describing "jar", so the word that completes the analogy should be a word that describes "vessel."
If accelerating to the speed of sound, the subsonic.
Energy is defined as the capacity to do work. The word "able" applies to a capable of doing work, or doing it correctly.
protozoa, nuclei Do your own Study Island.
Cipher or cypher (both are correctly spelt) describes concealing the meaning of a message by using a code.
Correctly is the adverb.
The word "hertz" can be correctly abbreviated as "Hz."
Yes, engineer is spelled correctly in your question.
He spelled the word correctly before the interview board.
A word that describes a noun is an adjective
The word that best describes me is special.