Assonance is an initial repeating consonant sound.
The 'th' sound in "weather" is initial, as it is the first sound in the word.
Chronic is the only one of the three with a short o sound.
Alliteration.
The initial sound in the word "tin" is the voiceless alveolar stop /t/.
ah
Resonation
a e i o u
gem
Yes, the word "frindle" itself is an alliteration. Alliteration is the repetition of the same initial sound in neighboring words, and in the case of "frindle," the initial "f" sound is repeated in the word.
Alliteration word like noodle
arthflh