13-Letter Words Matching ___U______S__

There are 40 13-letter words that match ___U______S__. 20 are common words, such as ARDUOUSNESSES and EXCURSIONISTS. A rarer one is VOLUNTARYISTS. In this set, S is the most frequent open letter (39 words). 26 words contain a doubled letter.

Full list 40

Common words

arduousnessesexcursionistsfatuousnessesfuturologistsgenuinenessesgrouchinessesillustriouslyimmunologistsindustriouslyinjudiciouslynaturalnessesroguishnesses
arduousnessesexcursionistsfatuousnessesfuturologistsgenuinenessesgrouchinessesillustriouslyimmunologistsindustriouslyinjudiciouslynaturalnessesroguishnessesscruffinessesscrumptiouslystaunchnessestenuousnessesthoughtlesslyunluckinessesvacuousnessesvolunteerismsassurednessesintuitionismsreductionistssinuousnessesimmunogenesesimmunogenesisinhumannessesintuitionistspiquantnessespneumonitisespseudoclassicreductionismsslouchinessestriumphalismstriumphalistsunquietnessesvoguishnessesvolublenessesvoluntaryismsvoluntaryists

About this list

Words
40 (20 common words)
Common example
arduousnesses
Rare example
voluntaryists
Doubled letters
26
Ending in S
34
Most frequent letter
S (39)

Questions

How many 13-letter words matching ___u______s__ are there?

40. 20 of them are common words.

What is a common example?

ARDUOUSNESSES is among the common words in this set.