IAS or i.a.s.

1. Immediate access store (computing)
2. Immigration Advisory Service
3. Indicated air speed (aeronautics)
4. Instrument approach system

• flushnesses
• flushy
• fluster
• flustered
• flustering
• flusterment
• flusterments
• flusters
• flustery
• Flustra
• flustrate
• flustrated
• flustrates
• flustrating
• flustration
• flustrations
• flute
• flute bird
• fluted
• flutemouth
• flutemouths
• fluter
• fluters
• flutes
• flutier