松毬[matsupokkuri] pinecone
手毬[temari] traditional Japanese handball game
毬投げ[marinage] playing catch
毬果[kyuuka] (pine) cone

毬栗[igaguri] chestnut in its burr
毬栗頭[igaguriatama] close-cropped head
毬藻[marimo] marimo (variety of algae, Cladophora aegagropila)
ゴム毬[gomumari] rubber ball

藻掻く[mogaku] to struggle
海藻[kaisou] seaweed
褐藻[kassou] brown algae
珪藻[keisou] diatom
珪藻土[keisoudo] diatomaceous soil

紅藻[kousou] red algae
才藻[saisou] poetic talent
稚海藻[wakame] wakame (species of edible brown seaweed, Undaria pinnatifida)
藻草[mogusa] water-plants