1. 皐月: さつき　 Rhododendron indicum (azalea); 5th month of the lunar calendar
2. 五月晴れ: さつきばれ　Clear sky in May. / Old: Clear sky during the rainy season
3. 五月: ごがつ　May / さつき same as (1)
4. 五月雨: さみだれ long lasting rain during the 5th of the lunar calendar. rainy season.
5. 端午の節句: たんごのせっく the Boys' Festival on May 5th. The festival was renamed to Children's Day (こどもの日) in 1948.
6. 鯉のぼり: こいのぼり carp streamers (for boy's festival on May 5th)
7. 吹流し: ふきながし a streamer
8. 葉桜: はざくらa leafy cherry tree whose blossoms have fallen
9. 俳句: はいく a haiku poem. A Japanese poem consisting of 3 lines with 5-7-5 syllables
10. 与謝蕪村: よさぶそん Yosa Buson, or Yosa no Buson. A famous Japanese haiku poet (1716 ~ 1783) Haiku by Buson: 『葉ざくらや 　南良に二日の　 泊り客』 (Hazakura ya, Nara ni futsuka no, tomarikyaku.) Seasonal word: 葉桜 --> Summer (I spent 2 days in Nara enjoying beautiful hazakura (leafy cherry trees after flowers have fallen).)

子：こ、ね、し、じ

子子子子子子子子子子子子：
ねこのここねこ、ししのここじし
猫の子子猫、獅子の子子獅子
A baby cat is a kitten, and a baby lion is a lion cub.
Why do you add の? Conjunctions "の" were often omitted in writing in old days.