ticktock vs ticktack

ticktock and ticktack both are nouns.

Word	Noun	Adjective	Verb	Adverb
ticktock	Yes	No	Yes	No
ticktack	Yes	No	Yes	No

As verbs, ticktock and ticktack are synonyms defined as:

Other synonyms of ticktock include beat, tick.

ticktock (noun)	ticktack (noun)
steady recurrent ticking sound as made by a clock	system of signalling by hand signs used by bookmakers at racetracks

ticktock (verb)	ticktack (verb)
make a sound like a clock or a timer	make a sound like a clock or a timer