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Words with Suffix “--on” in English (US)

Browse English (US) words ending with the suffix “--on”, complete with pronunciations, syllable breakdowns, and linguistic insights.

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--on

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7 words

--on Greek particle suffix indicating subatomic particle; applies to first word

electron microscope
5 syllables19 letters
e·lec·tron mi·cro·scope
/ɪˌlɛktrɒn ˈmaɪkrəˌskoʊp/
noun

'Electron microscope' is a two-word compound noun. 'Electron' divides as e-lec-tron (3 syllables), with primary stress on 'lec'. 'Microscope' divides as mi-cro-scope (3 syllables), with primary stress on 'mi'. Total: 6 syllables. Greek-origin morphemes: 'electr-' (amber), '-on' (particle), 'micro-' (small), '-scope' (to view). IPA: /ɪˌlɛktrɒn ˈmaɪkrəˌskoʊp/.

microlepidopteron
7 syllables17 letters
mi·cro·le·pi·do·pter·on
/ˌmaɪ.kroʊ.lɛ.pɪ.dəp.tɛr.ən/
noun

The word 'microlepidopteron' is divided into seven syllables: mi-cro-le-pi-do-pter-on. Stress falls on the fifth syllable ('do'). It's a noun of Greek origin, referring to a small moth, and its syllabification follows standard US English rules based on vowel-consonant patterns and stress.

ophthalmencephalon
7 syllables18 letters
op·thal·mo·en·ceph·a·lon
/ˌɒfθælmoʊˌɛnˈsɛfəlɒn/
noun

Ophthalmencephalon is a seven-syllable noun of Greek origin, with primary stress on the penultimate syllable. Syllabification follows vowel-based rules, respecting morpheme boundaries and accounting for consonant clusters. It describes a rare congenital malformation.

palaeodictyopteron
8 syllables18 letters
pa·lae·o·dic·ty·op·ter·on
/ˌpælioʊˈdɪktioʊptərən/
noun

Palaeodictyopteron is an eight-syllable noun with primary stress on the fifth syllable ('dic'). Syllabification follows rules maximizing onsets and avoiding stranded consonants, with the 'ae' digraph pronounced as a long 'a' sound. It's a complex word of Greek origin referring to an extinct insect order.

palaeoencephalon
7 syllables16 letters
pa·lae·o·en·ce·pha·lon
/ˌpælioʊˌɛnˈsɛfələˌnɔn/
noun

The word 'palaeoencephalon' is a seven-syllable noun of Greek origin. Syllable division follows the onset-coda rule, with consideration for diphthongs and consonant clusters. Primary stress falls on the antepenultimate syllable. The word's morphemic structure reveals its ancient roots relating to the brain.

splanchnoskeleton
5 syllables17 letters
splan·chno·ske·le·ton
/splæŋˌkoʊnoʊˈskelɪtən/
noun

The word 'splanchnoskeleton' is divided into five syllables: splan-chno-ske-le-ton. Primary stress falls on the penultimate syllable. It's a noun of Greek origin, referring to the internal skeletal support of visceral organs. Syllabification follows the principles of maximizing onsets and handling consonant clusters.

thalamencephalon
7 syllables16 letters
tha·la·mo·en·ce·pha·lon
/θæləˈmɛn.sɛf.ə.lɑn/
noun

The word 'thalamencephalon' is a seven-syllable noun of Greek origin. Primary stress falls on the fifth syllable ('ce'). Syllabification follows standard English vowel and consonant-vowel patterns, with consideration for morpheme boundaries. It shares syllabic structure and stress patterns with other '-encephalon' terms.