3 letters:
ana

4 letters:
mana, nona, sana

5 letters:
agana, ahana, akana, asana, awana, ayana, baana, biana, bwana, ciana, con a, dahna, dawna, dhana, donah, donna, dwana, fauna, gaana, gauna, giana, gonna, guana, ilana, isana, ivana, jaana, jhana, jnana, johna, jonna, juana, khana, launa, liana, lonna, maana, mauna, monna, ngana, non-a, nonna, non a, ohana, osana, ronna, sauna, siana, sonna, swana, tawna, tsana, twana, umana, usana, wanna, wanta

6 letters:
aiyana, alanna, albana, alpana, aryana, astana, aulana, ayanna, baanah, befana, bimana, briana, chauna, dhyana, diwani, gianna, gone a, guiana, guyana, hagana, iguana, ivanna, jacana, johana, johnna, john a, kafana, karana, katana, keanna, kerana, kinana, kitana, kiwani, lahana, lanana, leanna, lianna, mahana, manana, marana, milana, nagana, nidana, osanna, oxyana, parana, picana, purana, putana, quanah, ratana, romana, rosana, rumana, sabana, sakana, samana, sayana, shauna, shawna, susana, tanana, tawana, thaana, tswana, tucana, upon a, vahana, vamana, vasana, vemana, vimana, wayana, yukana, zuzana

7 letters:
abronah, alannah, alemana, alesana, alkanna, araunah, arowana, barsana, bhiwani, bibiana, budhana, capanna, caronna, carvana, castana, chakana, chicana, chrono-, cortana, curtana, damiana, darsana, didonna, dragana, drawn a, fabiana, flycana, gahanna, germana, guarana, guayana, haryana, ikebana, infauna, kaimana, kwinana, ladonna, lhamana, louanna, madonna, manzana, mehsana, mokanna, nibbana, nirvana, nirwana, okhrana, othonna, porzana, pramana, rachana, rajanna, rihanna, rossana, saamana, saatana, sadhana, sartana, scatana, scianna, sequana, shaunna, shawnna, shobana, silvana, sramana, sudhana, suzuana, tarhana, tatiana, tatyana, tawanna, tectona, tijuana, toscana, upasana, zatanna

8 letters:
antisana, aradhana, araucana, avifauna, batswana, benihana, bonamana, botswana, ecbatana, epifauna, estefana, fistiana, furigana, giancana, giovanna, giuliana, graciana, hinayana, julianna, katakana, kaukauna, lesbiana, mahayana, majorana, marianna, morganna, nanohana, narayana, navayana, oddiyana, pacarana, pedimana, quinkana, ramayana, rasayana, santanna, saravana, savasana, setswana, shobanna, stephana, sukihana, svetlana, tadasana, tatianna, toramana, yogasana

9 letters:
bonadonna, casignana, chenaanah, cristiana, daikatana, dushasana, favignana, gharshana, gugalanna, hone-onna, la-mulana, madragana, marihuana, marijauna, marijuana, mazzorana, megafauna, meiofauna, melagrana, mussurana, nure-onna, pampusana, periyanna, rajputana, salangana, santayana, santianna, shavasana, sukhasana, telangana, transcona, upanayana, vairocana, vajrayana, vipassana, virochana, yuki-onna

10 letters:
al-muqanna, ameraucana, belladonna, colombiana, digiovanna, dominicana, duryodhana, georgianna, isandlwana, lackawanna, macrofauna, microfauna, primadonna, pyttipanna, quadrumana, sallekhana, sangliyana, sebastiana, siddhasana, takanohana, uchigatana, uttarayana, vibhishana, vriksasana, yakshagana

11 letters:
antahkarana, antankarana, babruvahana, entomofauna, geshtinanna, habyarimana, kazakhstana, parinirvana, pre-madonna, prima donna, shalivahana, transoxiana, trikonasana, troglofauna, undergone a, waaqeffanna

12 letters:
bhujangasana, chiriyakhana, dutch guiana, genus iguana, herpetofauna, ichthyofauna, kreisleriana, p. v. ramana, pratighatana, samavasarana, samsu-ditana, svastikasana, vaisampayana

13 letters:
common iguana, desert iguana, iguana iguana, marine iguana, maudgalyayana, nara-narayana

14 letters:
bophuthatswana, british guiana, futakuchi-onna, jana gana mana

15 letters:
smriti mandhana

16 letters:
genus sebastiana

17 letters:
paschimottanasana, rashmika mandanna

18 letters:
netherlands guiana

19 letters:
capital of botswana, satyadev kancharana

20 letters:
battle of isandlwana

4 letters:
kama, lama, dama, mama, rama

5 letters:
comma, llama, mamma, drama, brama, agama, momma, guama, ilama

6 letters:
pyjama, squama, brahma, pajama, mazama, retama, sajama

7 letters:
diorama, ariomma, cariama, gautama, giriama

8 letters:
yokohama, balarama, fujiyama, murayama

9 letters:
programma, cyclorama, dama dama

10 letters:
dalai lama, grand lama, genus dama, genus lama, hygrotrama

11 letters:
parashurama

12 letters:
closet drama

13 letters:
musical drama

14 letters:
inverted comma, domestic llama