tick vs ticktack

tick and ticktack both are nouns.

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

As verbs, tick and ticktack are synonyms defined as:

Other synonyms of tick include beat, ticktock.

tick (noun)	ticktack (noun)
any of two families of small parasitic arachnids with barbed proboscis; feed on blood of warm-blooded animals	system of signalling by hand signs used by bookmakers at racetracks
a light mattress
a mark indicating that something has been noted or completed etc.
a metallic tapping sound

tick (verb)	ticktack (verb)
put a check mark on or near or next to	make a sound like a clock or a timer
sew
make a clicking or ticking sound
make a sound like a clock or a timer