tic-tac 
(also tick-tack)
noun [mass noun]
(In the UK) a kind of manual semaphore used by racecourse bookmakers to exchange information.
Origin
Mid 16th century (denoting a repeated ticking sound): imitative; compare with tick-tock. The current usage (originally slang) dates from the late 19th century.
- relight
- religieuse
- religieux
- religio-
- religion
- religionary
- religion complex
- religioner
- religionise
- religionism
- religionist
- religionize
- religionized
- religionizing
- religionless
- religionless Christianity
- religion shop
- religiose
- religiosity
- religioso
- religious
- religious education
- religious house
- religious humanism
- religious humanist