water
Heavy rain.
Yes, "underground" is a compound word, formed by combining the words "under" and "ground."
Earth is a proper noun. Proper nouns are the unique names of people, places, or things. Common nouns are the words for general things. If a common noun is part of a name, it becomes a proper noun. Pronouns always replace proper and common nouns.
These words all refer to different types of "physical entities" or substances; fog is a natural phenomenon, jack is a device used to lift heavy objects, and a bodybuilder is a person who builds muscle through exercise.
Cupid would likely respond by saying, "In the heart." This is a play on words, as honey is a metaphor for love and sweetness, which is often associated with the heart.
bars
They make a trick question.
Fire
they all have vowels
Organize
out
e
The other common EA words are break and great.
flowers
They all rhyme
They all start with "D".
they all rhyme :D