| อุไร | ooL raiM | noun | gold |
| อุสสาหะ | ootL saaR haL | | [alternate spelling of อุตสาห์] |
อุเหม่  | ooL mehL | interjection, formal, poetic, archaic, ancient | [an interjection used usually in literature to express the persona's anger, threat and reprimand] |
| อู | uuM | | [pronunciation of the Thai long vowel, -ู ] |
| อู่ | uuL | noun | dock; harbor; service station; dry dock |
| noun | cradle |
| อู้ | uuF | | [onomatopoeic sound of wind] |
| adverb, formal | loudly; aloud |
| verb, colloquial | to negotiate a tricky situation; to play for time |
| verb, transitive, intransitive, colloquial | [Northern dialect] to speak |
| noun | [ซออู้] a two-stringed bass fiddle; low-pitched violin |
| อูกันดา | uuM ganM daaM | proper noun, geographical | [ประเทศอูกันดา] Uganda, a country in Africa |
| อูกานดา | uuM gaanM daaM | | [alternate spelling of อูกันดา] |
อู้กำเมือง | uuF gahmM meuuangM | verb, phrase, colloquial | [Northern dialect] to speak the local tongue |
| อู่ซ่อมรถ | uuL sawmF rohtH | noun | service station; repair garage for a vehicle |
อูฐ  | uutL | noun | camel |
| อู่ต่อเรือ | uuL dtaawL reuuaM | noun | dock |
| อู่น้ำ | uuL naahmH | noun | wet dock |
| อู้ฟู่ | uuF fuuF | adjective, colloquial | wealthy |
| อูม | uumM | adjective | swollen |
| verb, intransitive | to swell; become fat |
| อู่รถ | uuL rohtH | noun | garage; auto repair garage |
| อูลานบาตอร์ | uuM laanM baaM dtaaw[r]M | proper noun, geographical | Ulaanbaatar, the capital city of มองโกเลีย (Mongolia) |
| อู่แห้ง | uuL haaengF | noun | dry dock; graving berth |
| อูอากาดูกู | uuM aaM gaaM duuM guuM | | [alternate spelling of วากาดูกู] |
| อู้อี้ | uuF eeF | verb | to talk with a very nasal voice |
| เอ | aehM | loanword, English | [Thai pronunciation of the English letter,] 'A' |
| interjection | [expressing a pause, hesitation, uncertainty, etc.] er... |
| [pronunciation of the Thai vowel, เ ] |
| เอ้ | ehF | noun | leader; head honcho |
| adjective | leading; head; top; first |
 เอก | aehkL | noun, adjective, loanword, Pali | [usually used as an adjective] sole; solitary; single; chief; first; prime; important; leading; excellent; one; alone; lonely |
| noun, formal | [of Thai Tone] low |
| adjective, loanword, Pali | [Pali numeral] one; [usually used as a prefix] first; single |
| adjective | [designating the higest ranking officers] |
| noun, phrase, formal | [ไม้เอก] the first Thai Tone Marker; the Low Tone Marker (-่) |
| proper noun | [Thai nickname for a firstborn son] |
| เอก | aehkL gaL | | [alternate spelling of เอก] |
| เอ๊ก | ehkH | | [alternate spelling of เอ็กซ์] |
| เอกเขนก | aehkL khaL naehkL | verb, intransitive | to recline; lean back, using one's elbow to prop up the head |
| เอกจิต | aehkL jitL | noun | of one mind; thinking alike; having identical opinions or views |
| เอกฉันท์ | aehkL gaL chan[t]R | noun | unanimity; one voice |
| เอกชน | aehkL gaL chohnM | noun, adjective | private, individual, of a person, as oppose to public or governmental |
| เอ็กซ์ | ek[s]L | | [Thai pronunciation of the English letter,] 'X' |
| adjective, colloquial, loanword, English | [Thai transcription of the foreign loanword, "X" or "x"] [with sexual connotation as in, for example, "xxx porn"] |
| เอ๊กซ์ | ehk[s]H | | [alternate spelling of เอ็กซ์] |
| เอ็กซ์พลอเรชั่น | ek[s]L phlaawM raehM chanF | noun, loanword, English | [Thai transcription of the foreign loanword, "exploration"] |
| เอ็กซ์พี | ek[s]L pheeM | noun, proper noun, adjective, loanword, English | [Thai transcription of the foreign loanword, "XP"] (i.e.) Windows XP |
| เอ็กซ์เรย์ | ek[s]L raeh[y]M | | [Thai transcription of the foreign loanword, "x-ray"] an x-ray; to x-ray |
| เอ็กซิต | ekL sitH | noun, verb, loanword, English | [Thai transcription of the foreign loanword, "exit"] |
| เอ็กซิตโพล | ekL sitH phohnM | noun, loanword, English | [Thai transcription of the foreign loanword, "exit poll"] |
| เอ๊กเซล | ehkH saehnM | proper noun, loanword, English | [Thai transcription of the foreign loanword, "Excel™"] |
| เอ็กไซ้ต์ | ekL sai[d]H | adjective, loanword, English | [Thai transcription of the foreign loanword, "excited"] |
| เอกเทศ | aehkL gaL thaehtF | adverb | (to do something) on one's own; alone; |
| เอกโทษ | aehkL thohtF | noun | [in Thai grammar tone rules, referring to] a Thai word spelled with ไม้โท but pronounced as if spelled with ไม้เอก |
| เอกพจน์ | aehkL gaL phoht[n]H | noun, phrase, formal, loanword, Pali | [grammar] singular number |
| เอกภพ | aehkL phohpH | noun | universe |
| เอกภริยา | aehkL gaL phaH riH yaaM | noun | principal wife; first wife; legitimate wife |
| เอกภาพ | aehkL gaL phaapF | noun | unity; cohesiveness |
| เอกมัย | aehkL gaL maiM | proper noun, geographical | Ekkamai |
| common sense |
| เอกระ | aehkL gaL raH | attributive verb | (of a person) [is] independent-minded |
| เอกราช | aehkL gaL raatF | attributive verb | [of a country] [is] independent |
| เอกวาดอร์ | aehkL waaM daaw[r]M | proper noun, geographical | [ประเทศเอกวาดอร์] Ecuador, a country in South America |
| เอกศก | aehkL sohkL | noun | first year of the decade |
| เอ็กสพอร์ต | ekL sohpL aaw[r]tL | loanword, English | [Thai transcription of the foreign loanword, "export"] |
