นิติปรัชญา | niH dtiL bpratL yaaM | noun | legal philosophy |
| นิติเวช | niH dtiL waehtF | noun | forensic laboratory |
| นิติเวชวิทยา | niH dtiL waehtF witH thaH yaaM | | forensic science |
นิทรรศการ  | niH thatH saL gaanM | noun | exhibition |
| นิทรา | nitH raaM | verb, poetic | to sleep; slumber; drowse |
 นิทาน | niH thaanM | noun | fable; story; yarn; tale; folklore; fairytale |
| นินทา | ninM thaaM | verb | to gossip |
| noun | [การนินทา] gossip |
| นิพนธ์ | niH phohn[t]M | noun, verb, transitive, intransitive, formal, loanword, Pali | to write; compose; writing; composing; composition |
| นิพพาน | nipH phaanM | noun, Pali | the Enlightenment, the Buddhist concept of Nirvana (Sanskrit) or Nibbana (Pali) |
| นิ่ม | nimF | adjective | soft to the touch |
| adjective | tender (to chew) |
| นิมนต์ | niH mohn[d]M | verb | to welcome in (a monk); to invite (a monk) |
| นิมิต | niH mitH | noun | omen |
| นิยม | niH yohmM | adjective | popular |
| noun | principle; theory; doctrine |
| verb | to decree; to appoint; to order; to issue a decision |
| noun | political party |
| adjective | [grammar] demonstrative |
| attributive verb, formal | [is] fond of; admiring |
| noun | [ความนิยม] preference |
| นิยาม | niH yaamM | noun, loanword, Pali | definition of a word |
| นิยาย | niH yaayM | noun | novel, a book of a fictional story |
| noun | tale; narrative; fable; story; legend; myth; fairy tale; oral account |
| นิร | niH raH | prefix | without; not; un-; anti- |
| นิรโทษกรรม | niH raH thohtF gamM | noun | amnesty; absolution; pardon |
| นิรภัย | niH raH phaiM | adverb | safe |
| นิรันดร์ | niH ranM da[r]L | | [alternate spelling of นิรันดร] |
| นิรันดร | niH ranM daawnM | adjective, loanword, Pali | forever; eternal; perpetual; unceasing |
| นิราศ | niH raatF | verb | to leave or be exiled to a distant place, to depart, to part from |
| noun | [a kind of] long lyrical Thai poetry with eight (กลอนแปด) or nine (กลอนเก้า) syllables per line composed mainly on the theme of departure from one's residenceparticularly parting from and thus yearning to return to a loved one. The most celebrated and prolific Niraat poet in the Thai poetic tradition is ท่านสุนทรภู่ |
| นิรุกติ | niH rookH dtiL | noun, particle, formal, loanword, Pali | language; word |
| นิรุกติศาสตร์ | niH rookH dtiL saat[dr]L | noun, phrase, formal, loanword, Sanskrit | etymology |
| นิล | ninM | noun, adjective | sapphire |
| noun, plural, proper noun, formal | [ปลานิล] Tilapia nilotica or Nile tilapia. Imported from Africa and profitably farmed throughout Thailand, Thai-strain Nile tilapia grows to a good size with dark, scaly skin and is considered one of Thailand's staple food fish |
| นิว | niuM | adjective, loanword, English | [Thai transcription of the foreign loanword, "new"] |
| นิ่ว | niuF | noun | gallstone; calculus; scale |
| verb | [of a face] to frown, to pull or to pucker |
| นิ้ว | niuH | noun | finger; toe; digit |
| noun | inch |
| classifier | [numerical classifier for finger] |
| นิ้วก้อย | niuH gaawyF | noun | little finger |
| นิวกินี | niuM giL neeM | proper noun, geographical | New Guinea |
| นิวเคลียร์ | niuM khliia[r]M | adjective, formal, loanword, English | [Thai transcription of the foreign loanword, "nuclear"] |
| adjective, formal, loanword, English | of, relating to, or constituting a nucleus (of a cell) |
| adjective, formal, loanword, English | [chemistry, physics] of or relating to the nucleus of an atom; pertaining to fission or fusion chain reactions |
| นิวเคลียส | niuM khliiatF | noun, formal, loanword, English | the small brighter and denser portion of a galaxy or of the head of a comet |
| noun, formal, loanword, English | [biology, physics] a central point, group, or mass about which gathering, concentration, or accretion takes place |
| นิวเจอร์ซี่ | niuM juuhrM seeF | proper noun, geographical, loanword, English | New Jersey [state of the United States] |
| นิ้วชี้ | niuH cheeH | noun | the forefinger; the index finger |
| นิวซีแลนด์ | niuM seeM laaen[d]M | proper noun, geographical, adjective | pertaining to New Zealand |
| proper noun, geographical | [ประเทศนิวซีแลนด์] New Zealand |
| นิวเดลฮี | niuM daehnM heeM | | [alternate spelling of นิวเดลี] |
| นิวเดลี | niuM daehM leeM | proper noun, geographical | New Delhi, the capital city of อินเดีย (India) |
| นิ้วเท้า | niuH thaaoH | noun | toe |
| นิ้วโป้ง | niuH bpohngF | noun, colloquial | thumb |
| นิ้วมือ | niuH meuuM | noun | finger |
| นิวเม็กซิโก | niuM mekH siH gohM | proper noun, geographical, loanword, English | New Mexico [state of the United States] |
นิวยอร์ก  | niuM yaaw[r]kF | proper noun, geographical, loanword | New York [state of the United States] |
| proper noun, geographical | [informal] New York City |
| proper noun, geographical | [เมืองนิวยอร์ก] New York City, a city in New York State (United States) with a year 2000 metro-area population 8,643,437 |
| นิ้วหัวแม่เท้า | niuH huaaR maaeF thaaoH | noun | big toe |
| นิ้วหัวแม่มือ | niuH huaaR maaeF meuuM | noun | thumb |
| นิวเอจ | niuM aehtL | noun, proper noun, phrase, loanword, English | [Thai transcription of the foreign loanword, "New Age"] [a bland, unintrusive, and perhaps unimaginitive style of music using both acoustic and electronic instruments and drawing on classical music, jazz, and rock] |
| นิวแฮมป์เชียร์ | niuM haaem[p]M chiia[r]M | proper noun, geographical | New Hampshire [state of the United States] |
| นิวาสสถาน | niH waatF saL thaanR | noun, poetic | abode, lodging |
| นิเวศ | niH waehtF | noun, formal, poetic, loanword, Sanskrit | abode; residence; house; habitation; place; city |
| [นิเวศวิทยา] Ecology |
| นิเวศน์ | niH waeht[n]F | noun | residence; abode; home; dwelling |
| นิเวศนวิทยา | niH waeht[n]F witH thaH yaaM | noun | ecology |
| นิเวศวิทยา | niH waehtF witH thaH yaaM | | Ecology |
