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