The term 'not as certain' can be described by three different words, all of which have seven or six letters. The first word is 'riskier', which means something that has a greater chance of danger or loss. The second word is 'dicier', which means something that is more uncertain or unpredictable. The last word is 'iffier', which means something that is more difficult to decide or determine. All three words describe something that is not as certain as something else.