Denshi Jisho — Online Japanese dictionary

せい 1: energy;
2: military strength
Noun 
ぜい groups engaged in some activity (players, companies, forces, etc.)
Suffix 
せこ beater (on a hunt)
Noun 
はずみ 1: bounce; spring; rebound;
2: momentum; inertia;
3: spur of the moment; impulse
Noun 
いせい power; might; authority
Common word, Noun 
きせい fervour; fervor; vigour; vigor; ardour; spirit
Common word, Noun 
姿 しせい attitude; posture; stance; approach; carriage (of the body)
Common word, Noun 
はずみ 1: bounce; spring; rebound;
2: momentum; inertia;
3: spur of the moment; impulse
Common word, Noun 
かせい assistance; backing; reinforcements
Noun, Suru verb 
かせい force of flames
Noun 
かぜい small military force; numerically inferior force
Noun 
ぎせい bluff; deceiving an enemy
Noun, Suru verb 
こぜい a small force
Noun 
ごせい stress; emphasizing one's speech
Noun 
しせい city conditions; municipal census
Noun 
じせい spirit of the age; trends; conditions
Noun 
せいい force; power; influence
Noun 
せいか influential family; the man in power
Noun 
たぜい great numbers; numerical superiority
Noun 
ちせい topography
Noun 
てぜい one's troops
Noun 
はずむ to spring; to bound; to bounce; to be stimulated; to be encouraged; to get lively; to treat oneself to; to splurge on
Godan verb with mu ending, Intransitive verb 
ぶぜい few; numerical inferiority
Noun 
ぶぜい outnumbered; overwhelmed
Noun 
よせい surplus power; momentum; impetus; inertia
Noun 
いきおい 1: force; vigor; vigour; energy; spirit; life;
2: influence; authority; power; might;
3: impetus; momentum; course (of events);
4: (Adverbial noun) naturally; necessarily
Irregular okurigana usage, Adverb, Noun 

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