'Otherwise' in the Bible

Certainly not! For otherwise, how will God judge the world?

But if it is by grace [God’s unmerited favor], it is no longer on the basis of works, otherwise grace is no longer grace [it would not be a gift but a reward for works].

Then appreciate the gracious kindness and the severity of God: to those who fell [into spiritual ruin], severity, but to you, God’s gracious kindness—if you continue in His kindness [by faith and obedience to Him]; otherwise you too will be cut off.