Words ending with -logy usually pertain to science or some theory.
Science of diseases.
Sometimes people say pathological liar. This means the person lies so much that it has to be a disease.
The software utility Cron is a time-based job scheduler in Unix-like computer operating systems.
Arranged in order by time.
A suffix used in pathological terms that denote inflammation of an organ ( bronchitis; gastritis; neuritis) and hence, in extended senses, nouns denoting abnormal states or conditions, excesses, tendencies, obsessions, etc. ( telephonitis; baseballitis).
Below. Subway is the way below, in the ground.
Below. Infrastrucutre and infrared comes to mind.