Or, different words at different times to refer to the same reality. I often use the words Life and God interchangeably. When UU's are uncomfortable with traditional religious language, I do not think that they are people without faith or religion. The use of these words reminds people of old fashioned, unhelpful definitions of these words. When these words bother you, think of them as metaphors.
Religious language can never be as precise as scientific language.
Religious language implies rather than denotes. You might call it experimental language. Use it if it works for you. Let it go if it doesn't. I feel actually called out of parish ministry to a ministry that focuses more specifically on spiritual growth.