n. 25B6; noun
the crew were all amateurs : NON-PROFESSIONAL, non-specialist, layman, layperson; dilettante.
what a bunch of amateurs : BUNGLER, incompetent, bumbler; Brit. informal bodger.
professional, expert.
25B6; adjective
an amateur sportsman : NON-PROFESSIONAL, non-specialist, lay; dilettante.
their amateur efforts : INCOMPETENT, inept, unskilful, inexpert, amateurish, clumsy, maladroit, bumbling; Brit. informal bodged.