10-Letter Words Matching ______E_I_

There are 161 10-letter words that match ______E_I_. 30 are common words, such as ALLERGENIC and ALPHABETIC. A rarer one is WASHETERIA. In this set, C is the most frequent open letter (111 words). 10 words contain a doubled letter.

Full list 161

Common words

allergenicalphabeticandrogenicanesthesiaanestheticantithesisantitheticapologeticarithmeticcyberneticcyclopediadiphtheria
allergenicalphabeticandrogenicanesthesiaanestheticantithesisantitheticapologeticarithmeticcyberneticcyclopediadiphtheriadisinheritempathetichypermediahypothesismetathesismultimediaorthopedicparaplegiaparaplegicpathogenicphenacetinphilatelicphotogenicprosthesisprostheticrotisseriesepticemiasepticemichysteresisalphamericamphotericangiogenicaudiogenicbijouteriebiogenesisbiogeneticbiosphericbizarreriebradytelicbrusqueriecatamnesiscatecheticcongenericdiagenesisdiakinesisdiapedesisdiphthericdysentericecphonesisemphysemicendotheliaepenthesisepexegesisepigenesiserotogenicestrogeniceurypteridexosphericflorilegiagaultheriaglycogenichemiplegiahypotheticiatrogenicleucopeniamesotheliametatheticmonoplegiamyastheniamyasthenicneurogenicnomotheticorogenesisorthogenicpangenesisparamnesiapatisserieperitheciaphocomeliaphylogenicquinquefidrhizogenicsaprogenicsarraceniascorpaenidsynergeticthimblerigtransgenictyphogenicunacademicunathleticunestheticunhygienicvideogenicacetylenicallostericanagenesisantianemiaantiemeticantipoeticaphaeresisaphaereticbacteremiabacteremiccariogeniccatechesiscephalexincosmogeniccyanogeniccyclopediccypripediadiageneticdiarrheticdiphyleticdisbenefitdysgenesisdyskinesiadyskineticendotheciaepentheticepexegeticepigeneticerythremiaflorigenichemiplegichystereticintermedinintragenicisogameticlactogenicleukopenialeukopenicmassetericmediagenicmesentericmonostelicmultigenicnaphthenicnonallelicnonasceticnongeneticnonmimeticoligomericorogeneticosteogenicpaedogenicpangeneticpolyolefinprobenecidradiogenicreaccreditsporogenicsuperhelixsynaeresistautomerictetramericuricotelicwashateriawasheteria

About this list

Words
161 (30 common words)
Common example
allergenic
Rare example
washeteria
Doubled letters
10
Ending in S
21
Most frequent letter
C (111)

Questions

How many 10-letter words matching ______e_i_ are there?

161. 30 of them are common words.

What is a common example?

ALLERGENIC is among the common words in this set.