Yes, you can train a compressor[1] on a corpus of text, then compress individual words in the text and store their compressed bytes in e.g. a Vec<Vec<u8>>[2] and finally for any of the Vec<u8>s you can access the decompressor[3] and decompress (a slice of) the Vec<u8>[4].

[1] https://docs.rs/fsst-rs/0.4.1/fsst/struct.Compressor.html#me... [2] https://docs.rs/fsst-rs/0.4.1/fsst/struct.Compressor.html#me... [3] https://docs.rs/fsst-rs/0.4.1/fsst/struct.Compressor.html#me... [4] https://docs.rs/fsst-rs/0.4.1/fsst/struct.Decompressor.html#...