1. Based primarily on surmise rather than adequate evidence
   - conjectural, divinatory, hypothetical, supposed, suppositional, suppositious, supposititious

See also: theoretic, theoretical

• stilbestrol
• stilbite
• stilboestrol
• stile
• stiletto
• stiletto heel
• still
• still life
• Still's disease
• still-fish
• still-hunt
• stillage
• stillbirth
• stillborn
• stillborn infant
• stillness
• stillroom
• Stillson wrench
• stilly
• stilt
• stilt plover
• stiltbird
• stilted
• stiltedly
• Stilton