Here are some examples of words ending in "-eer":
* Engineer: One who designs and builds engines or other machines.
* Volunteer: One who offers their services freely.
* Auctioneer: One who conducts an auction.
* Pioneer: One who is among the first to explore or settle a new area.
* Monteer: One who assembles or installs something.
The suffix "-eer" can also be used to create a sense of enthusiasm or expertise, often with a slightly archaic or formal tone.
For example:
* Avid reader: One who enjoys reading very much.
* Seasoned traveler: One who has traveled extensively.
Overall, "-eer" adds a distinct flavor of professionalism, activity, and expertise to the words it modifies.