Perfect Rhyme (same vowel sound and ending):
* It's hard to find a perfect rhyme, but "road" could work in some contexts.
Near Rhyme (similar vowel sound and ending):
* Close: code, mode, load, rode
* More distant: owed, abode, bestowed
Eye Rhyme (spelled similarly but pronounced differently):
* Broad, nod
Other Options:
* Rhyme with "dress" and ignore "code": bless, confess, chess, press
* Rhyme with "code" and ignore "dress": node, erode, explode
Ultimately, the best rhyme for "dress code" depends on the context and desired effect.