The term 'complete or extreme' can be represented by five different words in a crossword puzzle: ULTRA (5 letters), END (3 letters), FIASCO (6 letters), TOTAL (5 letters), and UTTER (5 letters). ULTRA is an adjective meaning 'very great in amount, extent, or degree, ' while END is a verb meaning 'to bring to an END or conclusion.' FIASCO is a noun meaning 'a complete failure or disaster, ' and TOTAL is an adjective meaning 'complete or absolute.' Finally, UTTER is an adjective meaning 'absolute or complete.' All of these words can be used to describe something that is complete or extreme.