Older edition of WordPerfect.
The degree of compatibility can only ever be determined by testing one or more files. If there are specific features (tables, raster graphics, vector graphics, captions, sections, columns, DDE links, etc.) you are interested in, please edit your question to provide this detail. Developers do read these questions and may be able to provide greater detail as to the degree of support for a given feature. Also indicate the particular WP versions. Thanks.
Here are a few links which gives you anwers: