amusing vs mirthful

amusing and mirthful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
amusing	No	Yes	No	No
mirthful	No	Yes	No	No

As adjectives, amusing and mirthful are synonyms defined as:

Other synonyms of amusing include comic, comical, funny, laughable, risible.

amusing (adjective)	mirthful (adjective)
arousing or provoking laughter	arousing or provoking laughter
providing enjoyment; pleasantly entertaining	full of or showing high-spirited merriment