The word "hypothetical" is an adjective that describes something that is assumed or characterized by a hypothesis, as in "hypothetical reasoning" or a "hypothetical case." Hypothetical also means a conditional or conjectural proposition that is not supported by evidence, according to Dictionary.com.
An example of the word "hypothetical" in a sentence as an adjective is: "Ask students to draw two hypothetical satellite images for each location depicting the two possible scenarios they have described." The word "hypothetical" can also be used as a noun meaning a hypothetical instance or situation. Synonyms of the word "hypothetical" include "suppositional," "speculative" and "theoretical."