IPA: /ˈlʌnʧtaɪm/
KK: /ˈlʌnʧˌtaɪm/
The period of time when people eat lunch, typically in the middle of the day.
We usually take a break at lunchtime to eat and relax.
Lunchtime → It is formed from "lunch" (originating from the 19th-century British slang term, possibly derived from "luncheon", meaning a light meal) and "time" (from Old English "tima", meaning a period or duration). The word "lunchtime" refers to the time designated for having lunch, or a meal taken in the middle of the day.
Think of 'lunch' as a light meal and 'time' as a period of day — lunchtime is simply the time for that meal.
No commonly confused words.