The plural is underwater roller coasters. The word underwater is an adjective describing roller coaster, adjectives don't take plural forms. Roller coaster is an open compound noun, the plural 's' goes on the end of the noun.
Yes, the word "tsunami" is a noun. It refers to a large ocean wave caused by an underwater earthquake or volcanic eruption.
Yes, the word 'tsunami' is a noun, a word for an enormous sea wave caused by an underwater earthquake or volcanic eruption; a word for a thing.
A pronoun can be a noun . A noun is simply the subject of a sentence
No. As a noun, harvest would be considered a common noun.
Yes, the word ledge is a noun, a singular, common, concrete noun; a word for a narrow horizontal surface projecting from a wall, cliff, or other surface; an underwater ridge; a word for a thing.
No, "dirty" is not considered a noun. It is an adjective used to describe something that is unclean or soiled.
Yes, 5 meters underwater is generally considered scuba diving. Scuba diving typically involves using a self-contained underwater breathing apparatus to explore underwater environments at various depths. While recreational diving can occur at varying depths, 5 meters is within the range commonly accessed by divers.
No, SCUBER is not a word it is an acronym and one of its meanings is "Self-Contained Underwater Breathing Apparatus"
Pronouns are not considered nouns. Pronouns are words that take the place of a noun, but they are not nouns. The pronoun 'I' takes the place of the noun (name) of the person speaking as the subject of a sentence or a clause.
Development is an abstract noun, a word for a process or a state.
No