บ่าว  | baaoL | noun | servant; menial; slave |
| noun | bridegroom |
| noun | attendant |
| noun | young man |
| noun, adjective | [Isaan dialect] ชาย |
บ่าวสาว | baaoL saaoR | noun | the wedding couple |
| บาศ | baatL | noun | lasso; lariat; chain; snare; noose |
| บาศก์ | baat[k]L | noun | a gaming die or dice |
| บาสเกตบอล | baatL gaehtL baawnM | | [alternate spelling of บาสเก็ตบอล] |
| บาสเก็ตบอล | baatL getL baawnM | noun, loanword, English | [Thai transcription of the foreign loanword, "basketball"] |
| noun | [กีฬาบาสเก็ตบอล] the game of basketball |
| [ลูกบาสเก็ตบอล] a basketball |
| บ้าสงคราม | baaF sohngR khraamM | adjective | fanatical about war |
| บาสซูน | baatL suunM | noun, loanword, English | [Thai transcription of the foreign loanword, "bassoon"] |
| บาสรา | baatL raaM | proper noun, geographical | Basra, a city in Iraq |
| บาห์เรน | baa[h]M raehnM | proper noun, geographical | [ประเทศบาห์เรน] Bahrain, a country in Asia |
| บาหลี | baaM leeR | proper noun | Bali; an island in Indonesia |
| proper noun, geographical | [เกาะบาหลี] (island of) Bali |
| noun | the poop deck in the rear of a ship |
| บาฬี | baaM leeM | | [alternate spelling of บาลี] |
| บาฮามาส์ | baaM haaM maa[s]M | | [alternate spelling of บาฮามาส] |
| บาฮามาส | baaM haaM maatF | proper noun, geographical | [ประเทศบาฮามาส] Bahamas |
| บำนาญ | bahmM naanM | noun | pension; monthly salary payments after retirement |
| บำบัด | bahmM batL | verb, transitive, intransitive, loanword, Khmer | to cure; to treat; to remedy; to get rid of |
| บำบัดทุกข์บำรุงสุข | bahmM batL thook[k]H bahmM roongM sookL | verb | to relieve suffering and bring happiness |
| บำเพ็ญ | bahmM phenM | verb | [of virtue] to practice; [of merit] to make; [of penance] to do; [of precepts] to observe |
| บำราศ | bahmM raatF | verb, intransitive, loanword, Pali | to forgo; to go without; to be separated from |
 บำรุง | bahmM roongM | verb | to care for; maintain; nurture; support |
| บำรุงรักษา | bahmM roongM rakH saaR | verb | take care of; protect |
| บำรุงเลี้ยง | bahmM roongM liiangH | verb | nourish |
| noun | [การบำรุงเลี้ยง] nutrition |
| บำเรอ | bahmM ruuhrM | verb | to lavish attention on; to pamper; to spoil |
| บำเหน็จ | bahmM netL | noun | retirement lump-sum premium compensation; bonus |
| บิ | biL | verb | to break off; to part; to split; to cleave |
| บิ้ก | bikF | adjective, loanword, English | [Thai transcription of the foreign loanword, "big"] |
| บิ๊ก | bikH | proper noun | [a common Thai nickname] |
| บิกินี | biL giL neeM | noun, loanword, English | [Thai transcription of the foreign loanword, "bikini"] |
| บิชเคก | bitL khaehkF | proper noun, geographical | Bishkek, the capital city of เคอร์จิสถาน (Kyrgyzstan) |
| บิฐ | bitL | noun | stool; bench; seat; chair |
| บิณฑบาต | binM thaH baatL | verb, intransitive | [as a Buddhist monk] to seek alms |
| noun | alms; food offerings received by a Buddhist monk |
| บิณฑบาตร | biL nohtH baat[r]L | noun, formal, loanword, Sanskrit | food-bowl; alms-dish |
| บิด | bitL | noun | dysentery |
| noun | [โรคบิด] dysentery |
| verb | twist; wrench; twirl; distort; deform |
| verb | wring; wring out |
| บิดขี้เกียจ | bitL kheeF giiatL | verb | to stretch one's body |
| บิดเบือน | bitL beuuanM | verb | distort; twist |
| บิดผัน | bitL phanR | verb, transitive | [of a plan] to go awry; [of the truth] to distort |
| บิดร | biL daawnM | noun | [see บิดา ] |
| บิดา | biL daaM | noun, formal | father |
| บิดามารดา | biL daaM maanM daaM | noun, formal | parents |
| บิดามารดาคือพรหมของบุตร | biL daaM maanM daaM kheuuM phrohmM khaawngR boot[r]L | example sentence, idiom | "Next to God, the parents." |
| บิทช | bitL chaH | noun, verb, colloquial, vulgar, loanword, English | [Thai transcription of the foreign loanword, "bitch"] |
| บิน | binM | verb | to fly |
| verb | [จะบิน] will fly |
| verb | [กำลังบิน] is flying |
| noun | [การบิน] flying; flight [the activity] |
| verb | [ควรจะบิน] [future tense] ought to fly |
| verb | [จะต้องบิน] will have to fly |
| บิ่น | binL | attributive verb | [is] chipped |
| บินขึ้น | binM kheunF | verb | to fly up |
| บินว่อน | binM waawnF | verb, intransitive | to flutter; to swarm |
| บินหนี | binM neeR | verb | to fly away |
บิล  | binM | loanword | bill; receipt; restaurant check or total |
| proper noun, person, colloquial, loanword, English | Bill [an English given name, short for วิลเลียม ] |
| บิลค่าไฟฟ้า | binM khaaF faiM faaH | noun, phrase | electric bill |
| บิลล์ | bin[l]M | | [alternate spelling of บิล] |
| บิลลี | binM leeM | proper noun, person, colloquial, loanword, English | Billy [a male given name, form of วิลเลียม and บิล ] |
