General:
* Typical
* Critical
* Practical
* Musical
* Historical
* Political
* Physical
* Technical
* Logical
* Classical
More Specific:
* Aeronautical
* Astronomical
* Biological
* Chemical
* Economical
* Geographical
* Mathematical
* Mechanical
* Medical
* Philosophical
* Psychological
* Statistical
* Theological
* Tropical
Less Common:
* Clerical
* Dramatical
* Electrical
* Ethical
* Magical
* Mechanical
* Metrical
* Optical
* Radical
* Surgical
* Tactical
* Typical
This is not an exhaustive list, but it gives you a good starting point! You can find many more words ending in "ical" by browsing through dictionaries or using online search engines.