User:Bequw/consecutive consonants

Words from Scrabble dictionary that has at least 5 consecutive consonants:
 * angsts (a feeling of anxiety, apprehension, or insecurity): 5
 * borscht (a soup made primarily of beets and served hot or cold often with sour cream): 5
 * borschts: 6
 * borshts (weird spelling): 5
 * crwth (an ancient Celtic stringed instrument that is plucked or bowed): 5
 * crwths: 6
 * dirndls (a full skirt with a tight waistband): 5
 * eighths: 5
 * heighths: 5
 * highths (weird spelling): 5
 * lengths: 5
 * phpht (interj: pht): 5
 * strengths: 5
 * thousandths: 5
 * tsktsk (to tsk): 6
 * tsktsks: 7
 * twelfths: 5
 * warmths: 5
 * wavelengths: 5

The one I thought of
 * phenolphthalein (a chemical used in pH tests): 5