Here are a few words that I am trying to tell whether they could be spelled correctly just by sounding them out: lion/zebra/valley/fault/fall/want/bird.
Multiple letter/letter combinations can correspond to the same sound. How do you guys tell which one to use when trying to guess a word? Or you don't if you've never seen the word before?
Only one pronunciation is possible for
bird, though exactly what that is depends on your dialect. In any standard English dialect, an
i followed by two consonants always becomes a schwa sound. The dialect determines whether you pronounce the
r or just use it to color the preceding vowel.
Other than that, all the words on your list are familiar to children around the age they're learning to read, so they can "sound them out" (pronounce them according to phonetic guidelines), then find a word they know which is a near match to the sound they produce.
I'm afraid the conclusion is that your task is easier for native Anglophones. We know how a couple of thousand common words are pronounced before we start learning to read them. Phonetics can guide us to guess which word a string of letters represents, so we have a very good chance of guessing right. Many of us have certain rarer words which we mispronounce until we learn better. A family friend pronounced
misled as if it were the past participle of the (nonexistent) verb "to misle".