2 syllables:
discom, iscom, liscom, swisscom, this come

2 syllables:
wisdom, system

3 syllables:
point system, pa system, file system, sound system, meristem, caste system, spoils system, brake system, gas system, god's wisdom, lens system, list system, phone system, school system, tax system, tense system, tone system, touch system, with wisdom

4 syllables:
number system, feudal system, weapons system, nervous system, filing system, metric system, support system, solar system, immune system, sprinkler system, social system, control system, water system, merit system, honor system, alarm system, cable system, coding system, coolant system, cooling system, credit system, data system, defence system, defense system, drainage system, drive line system, exhaust system, fuel system, heating system, highway system, jury system, language system, legal system, muscle system, patent system, plumbing system, power system, pricing system, railway system, rating system, scoring system, sewage system, sewer system, shipboard system, showing wisdom, software system, speaker system, steering system, tonal system, unix system, voting system, vowel system, weapon system, writing system

5 syllables:
accounting system, visual system, mercantile system, digestive system, lymphatic system, decimal system, binary system, endocrine system, vascular system, computer system, audio system, computing system, consonant system, gambling system, hydraulic system, hypertext system, ignition system, judicial system, logical system, loudspeaker system, measuring system, milky way system, promotion system, propulsion system, receiving system, recording system, reference system, sensory system, stereo system, surveillance system, suspension system, telephone system

6 syllables:
auditory system, security system, operating system, central nervous system, coordinate system, information system, public address system, economic system, early warning system, bulletin board system, urinary system, copernican system, ptolemaic system, reproductive system, consonantal system, electoral system, electrical system, engine cooling system, fire control system, lubricating system, mechanical system, missile defence system, missile defense system, monetary system, political system, television system, transportation system, ventilating system, ventilation system, word processing system

7 syllables:
classification system, water vascular system, federal reserve system, communication system, circulatory system, disk operating system, respiratory system, binary number system, decimal number system, inertial guidance system, international system, male reproductive system, multimedia system, phonological system, refrigeration system, selective service system, theological system

8 syllables:
autonomic nervous system, peripheral nervous system, database management system, cardiovascular system, sympathetic nervous system, articulatory system, color television system, federal home loan bank system, female reproductive system, gastrointestinal system, high fidelity sound system, target acquisition system, unix operating system

9 syllables:
basic point defense missile system, inertial navigation system, information processing system, naval tactical data system, number representation system, telecommunication system

10 syllables:
parasympathetic nervous system, microsoft disk operating system

11 syllables:
automatic data processing system, hierarchical classification system, interactive multimedia system

12 syllables:
relational database management system