支援【しえん】
support, backing, aid, assistance
援助【えんじょ】
assistance, aid, support
救援【きゅうえん】
relief, rescue
応援【おうえん】
aid, assistance, help, support, reinforcement, cheering, rooting (for), support
後援【こうえん】
support, backing
援護【えんご】
support, help, backing, covering (from enemy attack), protection
声援【せいえん】
(shout of) encouragement, cheering, rooting, support
援軍【えんぐん】
reinforcement