Key Stage 3 Spelling Lists in the DfES Framework for teaching English Appendix 2 is Mathematics-specific.
Core vocabulary for Mathematics: A DfES Key Stage 3 National Strategy document in Word format supporting Mathematics lessons in special schools and units with Key Stage 3 pupils.
Vocabulary Checklist: A DfES Key Stage 3 National Strategy document listing words used in teaching Mathematics in Years 7, 8 and 9.
Mathematics vocabulary flashcards for Year 7, Year 8 and Year 9, downloadable from the DfES website as compressed files.
One of the Key Stage 3 Word Lists in Harton School's Student Planner is Mathematics-specific.
Vocabulary worksheet factory: "Create unlimited original worksheet activities with 12 different worksheet formats including word shapes, crosswords, word searches, decoding and matching activities, word jumbles, cloze and punctuation exercises, alphabetical order, and more. It's like getting 12 great programs in one. Enter a word list once and then generate 18 different worksheet activities. Includes a customizable database of 3000 words with search and classification features and a 100,000 word spelling checker. You can even create your own vocabulary databases."
Starspell 2001, published by Fisher Marriott Software, is a computer program designed to assist the learning of spelling. It uses the Look-Say-Cover-Write-Check approach. It has a progressive approach to English spelling. One of the Word Lists in the package is Mathematics-specific. Every word is spoken and has an accompanying sentence. Adding lists is easy.
ekeducation publications published Mathematics Vocabulary Activities for primary classwork and homework. It focuses on gapped sentences and word searches and has an answer key.