flashboard vs flashboarding

flashboard and flashboarding both are nouns.

Word	Noun	Adjective	Verb	Adverb
flashboard	Yes	No	No	No
flashboarding	Yes	No	No	No

As nouns, flashboard and flashboarding are synonyms defined as:

flashboard and flashboarding: boarding place along the top of a dam to increase its height

flashboard (noun)	flashboarding (noun)
boarding place along the top of a dam to increase its height	boarding place along the top of a dam to increase its height