Intensative, spelled as "intensive", is an adjective that typically describes something that requires great effort, concentration, or thoroughness. When seeking synonyms for this word, one can consider various alternatives conveying similar meanings. Some possible options include "rigorous", which suggests a level of strictness and precision; "demanding", indicating the need for considerable effort or skills; "arduous", which characterizes tasks as difficult and challenging; "exacting", reflecting high standards or precise requirements; and "immersive", suggesting deep and thorough engagement. These synonyms provide a range of words to convey the idea of intensity in different contexts, allowing for precise expression and effective communication.