We don't have synonyms for paino yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are paint, pain and pains.
°(music) Soft. Used as a directive in sheet music in its abbreviated form, {p.}, to indicate lowering the volume of the music. In the pianoforte this is done by pressing the instrument's keys more lightly.
°(music) Soft. Used as a directive in sheet music in its abbreviated form, {p.}, to indicate lowering the volume of the music. In the pianoforte this is done by pressing the instrument's keys more lightly.