Thesaurus.com
Dictionary.com
Definitions

ticktock

[tik-tok] / ˈtɪkˌtɒk /
NOUN
tick
Synonyms
STRONG
beat blow clack click clicking flash instant minute moment pulsation pulse rap second shake tap tapping throb twinkling wink
WEAK
metallic sound
VERB
tick
Synonyms
STRONG
beat clack pulsate tap thump

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