English dictionary definition of:



  • street names for heroin
  • a deep prolonged loud noise
  • a booming or crashing noise caused by air expanding along the path of a bolt of lightning


  • utter words loudly and forcefully
  • to make or produce a loud noise
  • move fast, noisily, and heavily
  • be the case that thunder is being heard

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boom roar roaring scag skag smack

Spellzone course content

View spelling list Some th words and learn about the word thunder in the Spellzone English spelling course, Unit 4. Spelling the consonant digraphs, Part 1.

Scrabble score for thunder

Scrabble score = 11

generated at 05:35:04 on 23-09-19

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I have just finalised the progress of the year groups and am delighted to see that from December to June 53% of the 98 students using Spellzone have raised their standardised scores to 100 and above.

One of the students has put in a huge amount of effort in completing Spellzone at least 3 times a week since his arrival with us in January. Looking at his scores after the latest GL testing, his standardised score has risen from 99 to 131. This is a truly phenomenal result. I just wanted to share the best result I have ever seen.

Terrie Penrose-Toms, Casterton College