OO
In the word "plight," the letters "i" and "g" have the long "i" sound.
The letters OA make the long O sound in goal
The letter Y has a long I sound in typhoon. (The same is true of the word typhoid.)
The second A has a long A sound. In the homophone "aweigh" it is the EIGH or more specifically the EI that has the long A sound.
The letters U and Y together make the vowel sound. By itself, Y usually has the sound of a long I, but in this case the word buy has collected a U from its Middle English form bycgan and is differentiated from the homophone word , which is by.
Munch!
The sound of the long O (oh) can be made in French by -eau, -aux, -eux, and -eaux, as heard in the words flambeaux and tableaux, and the Cajun name Boudreaux.
oa
The letters "ee" are used when the sound is a long "e" as in "bee" or "see." The letters "ea" are used when the sound is a long "e" as in "beach" or "teach."
No one word can be made from all of those letters, nor can any word that is more than four letters long.
It is written ā and pronounced "ay."
Yes, the word made has a long a sound. Other examples of long a words are say, cake, paid, and weigh. There are many ways to spell the long a sound.