Denshi Jisho — Online Japanese dictionary

一寸 いっすん 1: one sun (approx. 3.03 cm);
2: a little bit (of time, distance, etc.)
Noun 
一声 いっせい voice; cry; shout
Noun 
一夕 いっせき one evening; some evenings
Adverbial noun, Temporal noun 
一席 いっせき sitting; feast; speech
Noun 
一隻 いっせき one boat; one ship
Noun 
一説 いっせつ one theory (opinion); another theory (opinion)
Noun 
一洗 いっせん thoroughly wash away
Noun, Suru verb 
一銭 いっせん one-hundredth of a yen; small amount of money
Noun 
一閃 いっせん flash; brandish
Noun, Suru verb 
一双 いっそう pair (esp. of folding screens)
Noun 
一曹 いっそう master sergeant (JSDF)
Noun 
一艘 いっそう one ship or boat
Noun 
逸走 いっそう escape; scud; scamper away
Noun, Suru verb 
一束 いっそく a bundle; a hundred
Noun, No-adjective 
逸足 いっそく fast runner; excellence
Noun 
一村 いっそん village; whole village
Noun 
一隊 いったい party; gang; company; squad
Noun 
一択 いったく (only) one option (game slang); one possible choice
Noun, Slang 
一反 いったん one-tenth hectare
Noun 
一段 いったん one-tenth hectare
Noun 
一対 いっつい pair; couple
Noun, No-adjective 
一擲 いってき casting off or away
Noun, Suru verb 
一滴 いってき drop (of fluid)
Adverbial noun, Temporal noun 
一徹 いってつ obstinate; stubborn; inflexible
Na-adjective, Noun, No-adjective 
一天 いってん the whole sky; firmament
Noun 
一転 いってん turn; complete change
Adverbial noun 

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