pt

1. Part
2. Past
3. Past tense
4. Pint or pints
5. Point
6. Port
7. Post-town

PT

1. Pacific Time
2. Personal trainer, or training
3. Physical therapy
4. Physical training
5. Postal telegraph
6. Pupil teacher
7. Purchase tax (historical)

Pt (chem)

Platinum

• light-heartedly
• light-heartedness
• light heavyweight
• light-heeled
• light horse
• light horseman
• light horsemen
• light horses
• lighthouse
• lighthousekeeper
• lighthouseman
• lighthousemen
• lighthouses
• light industry
• light infantry
• lighting
• lightings
• lighting-up
• lighting-ups
• lighting-up time
• lighting-up times
• light into
• lightish
• light-legged
• lightless