amateur vs dilettante

amateur and dilettante both are nouns.

Word	Noun	Adjective	Verb	Adverb
amateur	Yes	Yes	No	No
dilettante	Yes	Yes	No	No

As nouns, dilettante is a hyponym of amateur; that is, dilettante is a word with a more specific, narrower meaning than amateur:

amateur: someone who pursues a study or sport as a pastime
dilettante: an amateur who engages in an activity without serious intentions and who pretends to have knowledge

Other hyponyms of amateur include bird watcher, birder, dabbler, sciolist, hobbyist.

amateur (noun)	dilettante (noun)
someone who pursues a study or sport as a pastime	an amateur who engages in an activity without serious intentions and who pretends to have knowledge
an athlete who does not play for pay

amateur (adjective)	dilettante (adjective)
engaged in as a pastime	showing frivolous or superficial interest; amateurish
lacking professional skill or expertise