13-Letter Words Matching ____O_____S__

There are 122 13-letter words that match ____O_____S__. 43 are common words, such as AMNIOCENTESES and AMNIOCENTESIS. A rarer one is WELCOMENESSES. In this set, S is the most frequent open letter (116 words). 60 words contain a doubled letter.

Full list 122

Common words

amniocentesesamniocentesisamorousnessesanxiousnessesarduousnessesawesomenessesbiliousnessescallousnessescopiousnessescuriousnessescursorinessesdeviousnesses
amniocentesesamniocentesisamorousnessesanxiousnessesarduousnessesawesomenessesbiliousnessescallousnessescopiousnessescuriousnessescursorinessesdeviousnessesdubiousnessesenviousnessesfatuousnessesfulsomenessesheinousnesseshideousnessesimpiousnessesirksomenessesnervousnessesobviousnessesominousnessesonerousnessesopprobriouslyorthodontistsorthopaedistsoveroptimismsperiodontistspiteousnessespompousnessespurposelesslyraucousnessessarcophagusesseriousnessesstegosaurusestediousnessestenuousnessesvacuousnessesviciousnessesviscountesseswinsomenesseszealousnessesandrogynouslyapatosaurusesconvolvuluseseditorialistsforlornnessesgibbousnessesgymnosophistsheliotropismshypnoanalysisleptospirosesleptospirosislissomenessesmicroanalysesmicroanalysisnarcoanalysisnecrophilismsnoisomenessesnoxiousnessespathoneurosisphotocomposerphototropismssalmonellosessalmonellosisshadowinessessinuousnessesspirochetosistautologouslyuniformnessesviscousnessesamyloidosisesanisotropismscarbohydraseschemotropismscoleopteristscosmochemistscustomshousesdeinonychusesdichotomouslyeconometristsemulousnessesgallowglassesgaseousnesseshydrotropismsingrownnessesiontophoresesiontophoresisjealousnessesmastoiditisesmicroanalystsmicrocosmosesmicrofungusesmicroscopistsmyelofibrosesmyelofibrosisneurochemistsnoncommunistsnonsocialistsodorousnessesoperosenessesorthopteristsoveroptimistsperiostitisesphilosophisedphilosophisesphotochemistsphotocomposedphotocomposesphytochemistspictorialismspictorialistsradiochemistsriotousnessesruinousnessessilhouettistsspirochetosesthyroiditisesvariousnessesverbosenesseswelcomenesses

About this list

Words
122 (43 common words)
Common example
amniocenteses
Rare example
welcomenesses
Doubled letters
60
Ending in S
114
Most frequent letter
S (116)

Questions

How many 13-letter words matching ____o_____s__ are there?

122. 43 of them are common words.

What is a common example?

AMNIOCENTESES is among the common words in this set.