There are none...
Some 8 letter words that begin with the letter a:aardvarkabnormalabrasionabsenteeabstractacademicaccuracyactivateactivityadditionadditiveadequacyadherentadhesiveadmonishadvisoryaerationagnosticaircraftallergicalmightyalthoughaluminumambitionamortizeamputateanalogueanalyticannounceannuallyappendixappraiseapprovalaquariumarguablyarmchairasbestosastonishathleticaudienceaviatrix
Abnormal, approval and atypical are 8 letter words. They begin with the letter a and end with the letter l.
cardinal and cockatoo
Obedient, obituary, occasion, odorless, offended, offstage, omission and operator are 8 letter words. They begin with the letter o.
Increase and illusion begin with and I and are 8 letters.
8-letter wordscentroid9-letter wordscentroids10-letter wordscentromere, centrosome11-letter wordscentromeres, centromeric, centrosomes15-letter wordscentrosymmetric
8
initiate
Pacifier, painter, pamphlet, parallel and password are 8 letter words. They begin with the letter P.
Tabletop, tabulate and teakwood are 8 letter words. They begin with the letter T.
24 %
Predator.