waterproofing vs sealing

waterproofing and sealing both are nouns.

Word	Noun	Adjective	Verb	Adverb
waterproofing	Yes	No	No	No
sealing	Yes	No	No	No

As nouns, waterproofing and sealing are synonyms defined as:

waterproofing and sealing: the act of treating something to make it repel water

waterproofing (noun)	sealing (noun)
the act of treating something to make it repel water	the act of treating something to make it repel water
a coating capable of making a surface waterproof