dilettante vs dilettantish

dilettante is a noun but dilettantish is not a noun.

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

As adjectives, dilettante and dilettantish are synonyms defined as:

dilettante and dilettantish: showing frivolous or superficial interest; amateurish

Other synonyms of dilettante include dilettanteish, sciolistic.

dilettante (noun)	dilettantish (noun)
an amateur who engages in an activity without serious intentions and who pretends to have knowledge

dilettante (adjective)	dilettantish (adjective)
showing frivolous or superficial interest; amateurish	showing frivolous or superficial interest; amateurish