imperative
crucial
definitely, absolutely, without a doubt, surely, unquestionably, of course, positively.
Another word for answer in a mathematical calculation is "solution." This term refers to the result obtained after performing the necessary operations to solve an equation or problem.
I have absolutely no idea what i am doing.
No, Absolutely not
absolutely nothing it is a word that i madeup
Unnecessary
Absolutely necessary.
absolutely
AppallingAwfulBloodcurdlingDreadfulFearfulFrightfulFrieghteningGhastlyGrimGrislyGruesomeHair-raisingHideousHorrendousHorridHorrificLuridMacabreShockingTerribleTerrifying
Existent is another word for actually. Absolutely and indeed are additional synonyms for actually.
Absolutely is another word for unconditionally. Additional synonyms include completely and thoroughly.
Another word for obligatory is "required" or "necessary".
required, obligatory
Necessary or desired
Other words for require:demandrequest
are certain, affirmative, positive, absolutely sure , have faith in
http://thesaurus.reference.com/browse/necessary use these word at this website and it will help you