As nouns the difference between subboard and rubboard
is that subboard is a subdivision of a board (in various senses) while rubboard is a musical instrument used in zydeco music, resembling a washboard but without a frame, generally hung around the neck.
subboard
English
Noun
(
en noun)
A subdivision of a board (in various senses). rubboard
English
Noun
(
en noun)
A musical instrument used in zydeco music, resembling a washboard but without a frame, generally hung around the neck.
Synonyms
* frottoir