Thesaurus.com
Dictionary.com
Definitions

unheralded

[uhn-her-uhl-did] / ʌnˈhɛr əl dɪd /
ADJECTIVE
unsung
Synonyms
STRONGEST
anonymous overlooked unnamed unnoticed unrecognized
WEAK
uncelebrated unglorified unknown
Antonyms
STRONGEST
named
WEAK
announced celebrated expected glorified predicted recognized
ADJECTIVE
unexpected
Synonyms
WEAK
unannounced unanticipated unpredicted without warning
Antonyms
WEAK
announced celebrated expected glorified predicted recognized

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.