emphasis vs emphatic

emphasis is a noun but emphatic is not a noun.

Word	Noun	Adjective	Verb	Adverb
emphasis	Yes	No	No	No
emphatic	No	Yes	No	No

emphasis (noun)	emphatic (noun)
intensity or forcefulness of expression
the relative prominence of a syllable or musical note (especially with regard to stress or pitch)
special and significant stress by means of position or repetition e.g.
special importance or significance

emphasis (adjective)	emphatic (adjective)
	forceful and definite in expression or action
	sudden and strong
	spoken with emphasis