libmythes-dev 2:1.2.4-3build1 (ppc64el binary) in ubuntu focal

 MyThes is a simple thesaurus that uses a structured
 text data file and an index file with binary search
 to lookup words and phrases and return information
 on part of speech, meanings, and synonyms
 .
 This package contains the static library and header file needed
 to develop applications using mythes.