posted by Evie .
Could only and other be an alliteration?
Yes, if they are put word by word like the example below
There could be only one other way to figure out the puzzle.
A coomon known alliteration is Peter Piper Picked a Peck of Pickled Peppers.
Do you see a pattern?
No, they don't have the same sound. And alliteration is usually the repetition of consonants, not vowels.
"rifles' rapid rattle" (from a poem by Wilfred Owen, for example)
(In "only" the "o" is a long vowel. In "other" the "o" is a short vowel.)