Sometimes people prefer to label dota as an ARTS:
Action Real Time Strategy.
Some people dislike the MOBA nomenclature because it comes from Riot (maker of League of Legends; a clone of dota). In addition the term is pretty vague. Call of Duty, Starcraft, and DotA could all technically be “MOBAS”.
ARTS describes it a little better but I don’t think that term is great either.