June, July
In crosswords, "Riviera summer" is usually ete, the French word for summer. I realize that's only three letters.
The iris is the part of the eye that is a 4-letter word and starts with the letter "i." The iris is the colored part of the eye that surrounds the pupil and controls the amount of light entering the eye.
acre
BRAN
veni
ades, as in lemonades. A common answer in crossword puzzles.
lobe
sash, pane, sill
cell
sole heel lace
There are 4 phonemes in the word "summer": /s/, /ʌ/, /m/, /r/.
Four (4) letter word from the word PARTY: part. prat. arty. tray. prat. pray. tarp. rapt. paty. Five (5) letter word from the word PARTY: praty. yrapt.