Related Keyword is bold in ad

adwords preview tool

[onlineleben]

I just came across the following:
using the adwords preview tool for one of my ads I found that a competitor had a related keyword bolded in his his ad.
Lets say I search for exampletraining cityname, where exampletraining and cityname get bolded, the competitor has exampletravel cityname bolded.
How is this archieved?

[AdWordsAdvisor]

Hello onlineleben,

It's probably most effective to point you to some information from the AdWords Help Center, which covers this topic in some detail:

How do I make my ad text bold?
[adwords.google.com...]

Excerpting about half the text from that page:

Part of your ad text will appear in bold whenever it matches or nearly matches a user's search query. Here are a few examples to demonstrate how this feature works:

I. Search query exactly matches your ad text

* search query: rental car
your ad Title: Rental Car Bargains
how your ad appears: Rental Car Bargains

The search query is identical to a phrase in your ad, so that phrase appears in bold.

II. Search query nearly matches your ad text

* search query: rental cars
your ad Title: Rental Car Bargains
how your ad appears: Rental Car Bargains

Most plural and singular variations of a search query will appear in bold.
* search query: used fridge
your display URL: www.website.com/usedrefrigerator
how your ad appears: www.website.com/usedrefrigerator

Some common abbreviations and misspellings of a search query will appear in bold. This is also true for extremely relevant synonyms.

[...]

AWA

[onlineleben]

Awa,
thanks for the examples. They mirror what I already know and what made me puzzled.
Anyway,

This is also true for extremely relevant synonyms

I didn't know about this one - Thanks