upthrust upthrow • upthunder · · · Info · Definitions · Synonyms · Characters · · upthrust · · Text Latin · · Script 8 · · Length Definitions · · · (noun) (geology) a rise of land to a higher elevation (as in the process of mountain building). Synonyms: upheaval, uplift, upthrow. · · Noun Definition 1 Synonyms · · · upheaval · · Synonym 1 uplift · · Synonym 2 upthrow · · Synonym 3 Characters · · h latin small letter h U+0068 p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075