Hundreds of 10 letter words start with the letter a. A few of those words include abbreviate, abrasively, abruptness, absolutely, abstention, accelerate, acceptance, accidental, accomplish, acoustical, activation, additional, adequately, adjustment, adolescent, advisement, affirmable, affliction, aftershock, aggression, airfreight, Alcoholism, allocation, altogether, ambassador, ammunition, amphibians, amputation, analytical, anesthesia, annexation, annotation, anticipate, anticlimax, apparently, applicable, apprentice, architects, aristocrat, arithmetic, arrogantly, aspiration, assessment, assignment, assistance, assumption, astronomer, atrocities, attachment, attainable, attraction, auctioneer, Autographs, automation and automobile.
if you want to know what ten letter word starts with 'gasoline'. it could be 'automobile' or 'motorcycle'. if you want to know what ten letter word starts with 'gas', it's 'plasmatron'....
Eventually.
bottleneck
experience
maturation
Marseilles
connection
mistakable
workaholic
enthusiasm
vindictive
Locomotive