General -tic words:
* Artistic: Relating to art.
* Automatic: Happening or working by itself.
* Characteristic: A feature or quality that distinguishes something.
* Democratic: Relating to democracy.
* Dramatic: Relating to drama or theatre.
* Fantastic: Extraordinary or wonderful.
* Historic: Relating to history.
* Hypnotic: Relating to hypnosis.
* Romantic: Relating to romance.
* Scientific: Relating to science.
* Specific: Clearly defined or particular.
* Statistic: A numerical fact or piece of data.
* Systematic: Done or acting according to a fixed plan or system.
Words related to specific fields:
* Acrostic: A poem or other writing in which the first letter of each line spells out a word, name, or phrase.
* Biotic: Relating to living organisms.
* Diabetic: Suffering from diabetes.
* Eclectic: Deriving ideas, style, or taste from a broad and diverse range of sources.
* Electrolytic: Relating to electrolysis.
* Kinetic: Relating to motion.
* Lithic: Relating to stone.
* Magnetic: Having the properties of a magnet.
* Parasitic: Relating to parasites.
* Poetic: Relating to poetry.
* Pragmatic: Dealing with things sensibly and realistically in a way that is based on practical rather than theoretical considerations.
* Probiotic: Relating to bacteria that are beneficial to health.
* Psychopathic: Relating to a psychopath.
* Synthetic: Made by chemical synthesis rather than being of natural origin.
* Therapeutic: Relating to the treatment of disease or injury.
* Zootic: Relating to animals.
Other words:
* Actic: A type of acid.
* Aortic: Relating to the aorta.
* Critic: A person who expresses an opinion or judgment about something.
* Gothic: A style of architecture that originated in medieval France.
* Mystic: A person who believes in the existence of a spiritual or supernatural reality and seeks to achieve communion with it through contemplation, intuition, or other means.
* Panic: A sudden overwhelming fear.
* Plastic: A synthetic material that can be molded into various shapes.
This is not an exhaustive list, but it should give you a good starting point.