Collocations for synonymous - adj.

be, seem
become
remain
make sth
His deeds had made his name synonymous with victory.

consider sth, regard sth as, see sth as, treat sth as

exactly
almost, largely, more or less, roughly, virtually

with
The Delson name is synonymous with excellence in audio.
Until the late 18th century, ‘opera’ was almost synonymous with Italian opera.