More N1 vocabulary

• 連邦れんぽうcommonwealth; federation of states
• 分散ぶんさんdispersion; decentralization; variance (statistics)
• 中断ちゅうだんinterruption; suspension; break
• 飼育しいくbreeding; raising; rearing
• あべこべcontrary; opposite; inverse
• 亜科あかsuborder; subfamily