Kragen categorizes words that can (kinda) be spelled in a 32 bit hex number according to potential use inside a software system [via est].

Things lacking some usual feature: ba5e1e55, face1e55, deaf, 5eed1e55,
                                   5e1f1e55, ba1d
Recursion: ca5cade5
Graphical things: d00d1e, ea5e1, 5ca1ed
Subroutines: c0de, ca11ab1e, d0ab1e
Activation records: ca11ed
Encoding: c0ded, dec0ded
Ownership: deeded, 1ea5ed, ceded
Security and denials of service: 5afe, f100ded, 5ea1ed, f0e
Databases: DB
OO terms: facade, c1a55, 5e1f, ba5e
Large binary objects: b10b
Higher-order programming: f01d
Deception: f001ed
Compacting garbage collectors: c0a1e5ce
Ian Piumarta's design: c01a
Dates or base-10 numbers: decade
Things that are very determined or fault-tolerant: 0b5e55ed
Information leakage: b1abbed, b1ed, b1eed
Strings: babb1e, ba11ad
Things that don't make sense: Dada, baff1ed