twin·ning 
(twĭnĭng)
(twĭnĭng)n.
1. The bearing of twins.
2. A pairing or union of two similar or identical objects.
3. Mineralogy The formation of twin crystals.
- Philadelphia
- Philadelphia lawyer
- Philadelphian
- Philadelphia pepper pot
- Philae
- philander
- philanderer
- philanthropic
- philanthropical
- philanthropically
- philanthropist
- philanthropy
- philatelic
- philatelical
- philatelically
- philatelist
- philately
- -phile
- Philemon
- Philemon
- philharmonic
- philhellene
- philhellenic
- philhellenism
- philhellenist