強さ (translations)→ force lead power richness stern strength temperature
強化 (translations)→ augmentation buildup consolidation enforcement enhancement enrichment escalation
緊張 (translations)→ alarm alertness attentiveness electric focus narrow nervousness pressure strain stress stressed-out tense tenseness tension
激しさ (translations)→ acrimony intensity intensiveness pitch truculence velocity violence virulence
決意 (translations)→ conviction decide decisiveness determination feeling intent mind purpose resolve
決心 (translations)→ decision will-power
集中 (translations)→ busy centralization centralized concentration integration
増大 (translations)→ accession accretion increase increased increment
努力 (translations)→ effort endeavor energy exertion job plod strive toil try willingness