The vowel sound in "nose" is the open-mid back unrounded vowel, represented by the symbol /o/. It is a rounded vowel produced with the tongue placed in the back of the mouth.

The vowel sound in "book" is the 'oo' sound, which is a close back rounded vowel.

The symbols of the vowel triangle typically refer to the International Phonetic Alphabet (IPA) symbols representing the three corners of the vowel triangle: /i/ for close front, /a/ for open front, and /u/ for close back vowels. These symbols are used to represent vowel sounds in linguistic analysis and transcription.

Back has a short vowel sound for the 'a' in back. It is pronounced as /æ/.

The AW is a caret O vowel sound (or/aw) as in draw, ought, caught, and taut.

(In British English, OR often has the same sound as AW because there is no R sound. So the words caught and court sound the same, as do lore and law.)