| บอดีการ์ด | baawM deeM gaa[r]dL | noun, loanword, English | [Thai transcription of the foreign loanword, "bodyguard"] |
บอตสวานา  | baawtL saL waaM naaM | proper noun, geographical | [ประเทศบอตสวานา] Botswana, a country in Africa |
| บ็อตสวานา | bawtL saL waaM naaM | | [alternate spelling of บอตสวานา] |
| บ๊อตสวานา | baawtH saL waaM naaM | | [alternate spelling of บอตสวานา] |
บ่อทรายดูด | baawL saayM duutL | | quicksand pit [literally and figuratively] |
| บอน | baawnM | noun | [ต้นบอน] tropical plants of the genus Caladium, cultivated for their ornamental foliage, variously patterned in white, green, pink, or red. |
| noun | [ใบบอน] leaves of the ต้นบอน |
| บ่อน | baawnL | noun | casino, gambling or gaming establishment |
| to undermine, sap; to gnaw; to eat out |
| บ่อนการพนัน | baawnL gaanM phaH nanM | noun | casino |
บอนไซ  | baawnM saiM | noun, loanword, English | [Thai transcription of the foreign loanword, "bonsai"] |
| บ่อนทำลาย | baawnL thahmM laayM | verb | undermine; subvert |
| บอนน์ | baawn[n]M | proper noun, geographical | Bonn, a city in Germany |
| บ่อนลอยน้ำ | baawnL laawyM naahmH | noun, phrase | casino aboard a ship |
| บ่อนวิ่ง | baawnL wingF | noun | movable casino; floating craps game |
| บ่อน้ำ | baawL naahmH | noun | pond; water well |
| บ่อน้ำมัน | baawL nahmH manM | noun | oil well |
| บ่อน้ำร้อน | baawL naahmH raawnH | noun | hot spring |
| บ่อน้ำแร่ | baawL nahmH raaeF | noun | mineral spring |
| บ๊อบ | baawpH | proper noun | Bob [an English given name] |
| บอบช้ำ | baawpL chaahmH | | to wound; injure; hurt |
| attributive verb, adjective | [อย่างบอบช้ำ] [is] bruised, sore, battered |
| บอบบาง | baawpL baangM | adjective | thin or delicate and fragile |
| บ๊อบบี้ | baawpH beeF | proper noun | Bobby [an English given name] |
| บ่อเป็นหยัง | baawL bpenM yangR | example sentence | [Isaan dialect] ไม่เป็นไร |
| บ่อแมน | baawL maaenM | example sentence | [Isaan dialect] ไม่ใช่ |
| บอย | baawyM | noun, loanword, English | [Thai transcription of the foreign loanword, "boy"] |
 บ่อย | baawyL | adverb | often |
| adverb | [บ่อย ๆ] very often; frequently |
| บ๋อย | baawyR | noun, loanword, English | [Thai transcription of the foreign loanword, "boy"] servant; waiter |
| บ่อย ๆ | baawyL baawyL | adverb | very often; frequently |
| บ่อยครั้ง | baawyL khrangH | adverb | many times |
| บอยคอต | baawyM khaawtF | noun, verb, loanword, English | [Thai transcription of the foreign loanword, "boycot"] |
| บอยซ | baawyM saH | noun, loanword, English | [Thai transcription of the foreign loanword, "boys"] |
| บอยซี | baawyM seeM | proper noun, geographical | Boise, the capital city of ไอดาโฮ (Idaho) |
| บอร์ด | baaw[r]dL | noun, loanword, English | [Thai transcription of the foreign loanword, "board"] |
| บอร์ดติดประกาศ | baaw[r]dL dtitL bpraL gaatL | noun | bulletin board |
| บอระเพ็ด | baawM raH phetH | proper noun | a [species of] climber whose extremely bitter stems are used for curing fevers, skin diseases and other medicinal purposes |
| บอล | baawnM | noun, loanword, English | [Thai transcription of the foreign loanword, "ball"] a ball used in sports |
| noun | [ลูกบอล] a ball |
| บอลล์ | baawn[l]M | | [alternate spelling of บอล] |
| บอลลูน | baawnM luunM | noun, loanword, English | [Thai transcription of the foreign loanword, "balloon"] |
| บอสตัน | baawtL dtanM | proper noun, geographical | Boston, the capital city of แมสซาชูเซ็ตส์ (Massachusetts) |
| บอสเนีย | baawtL niiaM | proper noun, geographical | Bosnia |
| บอสเนียและเฮอร์เซโกวีนา | baawtL niiaM laeH huuhrM saehM gohM weeM naaM | proper noun, geographical | Bosnia and Herzegovia, a country in Europe |
| บ๊ะ | baH | interjection, archaic, onomatopoeia | [expletive interjection of anger or annoyance] darn!, drat! |
| บะบาย | baL baayM | | [alternate spelling of บ๊ะบาย] |
| บ๊ะบาย | baH baayM | loanword, English | "Bye-bye" |
| บะหมี่ | baL meeL | noun, loanword, Chinese | Chinese egg noodles |
| บัก | bakL | noun | [Isaan dialect] [addressing a childor when addressing an adult, a familiar, overly familiar, or somewhat derogatory honorific, as if introducing someone as] "This Guy" |
| particle | [Isaan variant of] มะ [a prefix syllable for many fruits or plants] |
| noun, colloquial, vulgar | [Isaan dialect] penis |
| บักเขียบ | bakL khiiapL | proper noun, phrase, colloquial | [Isaan term for] น้อยหน่า , custard apple |
| บักทัน | bakL thanM | proper noun, phrase, colloquial | [Isaan term for] พุทรา , date |
| บักเนียรแดกเหล้าอีกแล้วบ่ | bakL niianM daaekL laoF eekL laaeoH baawL | example sentence | [Isaan dialect] "Nien, are you boozing again?" |
| บักมี้ | bakL meeH | proper noun, phrase, colloquial | [Isaan term for] ขนุน , jackfruit |
| บักโม | bakL mohM | proper noun, phrase, colloquial | [Isaan term for] แตงโม , watermelon |
