teasing vs mocking

teasing is a noun but mocking is not a noun.

Word	Noun	Adjective	Verb	Adverb
teasing	Yes	Yes	No	No
mocking	No	Yes	No	No

As adjectives, teasing and mocking are synonyms defined as:

Other synonyms of teasing include quizzical.

teasing (noun)	mocking (noun)
the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances
playful vexation
the act of removing tangles from you hair with a comb

teasing (adjective)	mocking (adjective)
causing irritation or annoyance	abusing vocally; expressing contempt or ridicule
playfully vexing (especially by ridicule)	playfully vexing (especially by ridicule)
arousing sexual desire without intending to satisfy it