symbol vs accolade

symbol and accolade both are nouns.

Word	Noun	Adjective	Verb	Adverb
symbol	Yes	No	No	No
accolade	Yes	No	No	No

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

symbol: an arbitrary sign (written or printed) that has acquired a conventional significance
accolade: a tangible symbol signifying approval or distinction

symbol (noun)	accolade (noun)
something visible that by association or convention represents something else that is invisible	a tangible symbol signifying approval or distinction
an arbitrary sign (written or printed) that has acquired a conventional significance