The Oxford Thesaurus An A-Z Dictionary of Synonyms - instinctiveadj.

1) instinctual, intuitive, natural, innate, native, inborn, inbred, congenital, constitutional, reflex, visceral, intestinal, intrinsic, intuitional, subconscious, Colloq gut: She has an instinctive flair for design. 2) immediate, involuntary, irrational, mechanical, automatic, spontaneous: Harvey took an instinctive dislike to Percy when they met.