You write “d’accordo” or “daccordo”?
The correct form is d’accordo, with an apostrophe; the word comes from an elision of the letter I in di + accordo, between a preposition and a noun.
Io vado d’accordo con cani e gatti.
Andare d’amore e d’accordo.
Restiamo d’accordo così per stasera.
The form daccordo is always considered INCORRECT.
See also:
Is it written tutt’altro or tuttaltro?