casual vs everyday

casual and everyday both are adjectives.

Word	Noun	Adjective	Verb	Adverb
casual	No	Yes	No	No
everyday	No	Yes	No	No

As adjectives, casual and everyday are synonyms defined as:

Other synonyms of casual include daily.

casual (adjective)	everyday (adjective)
hasty and without attention to detail; not thorough	commonplace and ordinary
not showing effort or strain	appropriate for ordinary or routine occasions
occurring on a temporary or irregular basis	found in the ordinary course of events
marked by blithe unconcern
appropriate for ordinary or routine occasions
occurring or appearing or singled out by chance
natural and unstudied
characterized by a feeling of irresponsibility
without or seeming to be without plan or method; offhand