Which preposition to use with synonymous

with Occurrences 611%

Project Gutenberg-tm Project Gutenberg-tm is synonymous with the free distribution of electronic works in formats readable by the widest variety of computers including obsolete, old, middle-aged and new computers.

to Occurrences 5%

[201] To record, as applied to birds, is synonymous to the verb to sing: thus in "The Spanish Tragedy," act ii.

in Occurrences 3%

The two things were almost synonymous in his mind.

of Occurrences 1%

" A sinister smile played around the thin, gray lips of the man whose very name was hated through the great empire of the Czar, and was synonymous of oppression, injustice, and heartless tyranny.

Which preposition to use with  synonymous