Cheerful and contented are synonyms for happy.
Some synonyms for singer that start with the letter B are:baritoneballadeer
Righteous
There are no synonyms for late in the English language that begin with the letter Z.
Begin and origin are some synonyms for the word start.
Omphalos, but I don't think it has a standard adjectival form.
Some synonyms for the word "crazy" and begin with the letter d include the following: deranged, dingy, daft, delirious. There are more synonyms in the thesaurus entry listed below.
One word that could mean smart is Logical.
brands, breeds
Some double-letter words that are synonyms for initiating include "begin" and "start." While these words don’t contain repeated letters, they effectively convey the notion of initiating an action. However, if you are specifically looking for double-letter forms, "beginning" and "starting" can be considered, as they imply the act of commencing something.
Some 8 letter words that begin with the letter a:aardvarkabnormalabrasionabsenteeabstractacademicaccuracyactivateactivityadditionadditiveadequacyadherentadhesiveadmonishadvisoryaerationagnosticaircraftallergicalmightyalthoughaluminumambitionamortizeamputateanalogueanalyticannounceannuallyappendixappraiseapprovalaquariumarguablyarmchairasbestosastonishathleticaudienceaviatrix
They aren't exact synonyms with awesome in all cases, but in the general sense, these words would fit: Victorious Vivacious Voluminous