5 letters:
-mere, eftir, emeer, finir, ft-ir, hezir, jouir, mchir, nazir, ophir, phhir, vizir

6 letters:
almere, atazir, azmeer, bucear, cr dir, cubrir, jaghir, kephir, laveer, maftir, quaere, sakhir, saphir, scler-, shmeer, sudhir, tuyere, videre

7 letters:
-sphere, bashkir, benazir, cb mpir, cdr dir, cosmere, elsmere, epimere, fryrear, kinnear, maumere, mcateer, midyear, myomere, mystere, nyerere, premere, saquear, schmeer, tinghir, torgeir, uromere

8 letters:
14 phere, 3-sphere, al-qahir, antimere, bedphere, cabecear, casimere, chiudere, dividere, dungmeer, ectomere, eglatere, elsevier, ensphere, entomere, erdbeere, grasmere, headgear, hypomere, incidere, insphere, kashmere, lanphear, lanphere, lechmere, ljubomir, mahathir, maingear, maiziere, man-year, masameer, medcezir, mesomere, metamere, minniear, miserere, n-sphere, new-year, off-year, one-year, oosphere, oryctere, podomere, raindeer, retrovir, taxotere, tsundere, two-year, unsphere, windmere, woodmere, yukaghir

9 letters:
aciclovir, acyclovir, adenomere, assombrir, assouplir, baenomere, belvidere, besondere, biosphere, blanquear, blaubeere, capsomere, cassimere, chemclear, cidofovir, deprimere, descubrir, ecosphere, ellesmere, exosphere, fellsmere, fermerere, five-year, geosphere, gode-year, haslemere, hazlemere, icosphere, invermere, karyomere, leap-year, meyerbeer, noosphere, osteomere, pack-year, petrolear, reprimere, sarcomere, sunsphere, tenofovir, thirlmere, thiruveer, unisphere, vandeveer, websphere, whiteneir, windemere

10 letters:
actinomere, aerosphere, affranchir, amphiptere, arthromere, atmosphere, barysphere, belle-mere, blogsphere, buttermere, chaosphere, chromomere, cinesphere, cryosphere, ergosphere, eurosphere, felsenmeer, first-year, hemisphere, homosphere, ijsselmeer, indosphere, infosphere, kerseymere, kingsclere, krantiveer, light-year, manosphere, markermeer, mesosphere, mindsphere, nephromere, omnisphere, oncosphere, rhabdomere, rhombomere, rothermere, sinosphere, spheromere, telesphere, third-year, three-year, umifenovir, vandermeer, vanderveer, windermere, yesteryear

11 letters:
anglosphere, astrosphere, bathysphere, bijlmermeer, chemosphere, coccosphere, cosmosphere, dermatomere, famciclovir, fourth-year, ganciclovir, gravisphere, heliosphere, hydrosphere, hypersphere, leucosphere, lithosphere, microsphere, mountaineer, onchosphere, ozonosphere, penciclovir, photosphere, planisphere, rhizosphere, second-year, surgisphere, troposphere, undersphere

12 letters:
adminisphere, blastosphere, branchiomere, centrosphere, chromosphere, heterosphere, insbesondere, lincolnshire, neutrosphere, phyllosphere, plasmasphere, pseudosphere, rhabdosphere, spermosphere, stachelbeere, stratosphere, technosphere, thermosphere, trochosphere, valaciclovir, valacyclovir

13 letters:
asthenosphere, dollar-a-year, johannisbeere, magnetosphere

14 letters:
anthroposphere, chicken-n-beer, chromatosphere, haarlemmermeer, valganciclovir

15 letters:
left hemisphere, substratosphere

16 letters:
right hemisphere

18 letters:
eastern hemisphere, kirkcudbrightshire, western hemisphere

19 letters:
cerebral hemisphere, northern hemisphere, southern hemisphere

21 letters:
bowness-on-windermere

23 letters:
emtricitabine/tenofovir

7 letters:
chamber, painter

9 letters:
remainder, attainder

11 letters:
gas chamber, antechamber, gun chamber, oil painter

12 letters:
star chamber, lock chamber, sign painter, word-painter

13 letters:
cloud chamber, spark chamber, boron chamber, death chamber, house painter, scene painter

14 letters:
bubble chamber, burial chamber, firing chamber, piston chamber, supply chamber, vacuum chamber

15 letters:
council chamber, torture chamber

16 letters:
portrait painter, presence chamber

17 letters:
bill of attainder, cremation chamber

18 letters:
ionization chamber, hyperbaric chamber, resonating chamber

20 letters:
wilson cloud chamber