extension phone

NOUN /ɪk'stɛnʃən_foʊn/
15 LETTERS · STARTS WITH E

extension phone is a valid 15-letter word worth 26 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
E1X8T1E1N1S1I1O1N1P3H4O1N1E1
1 + 8 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 4 + 1 + 1 + 1 =26 PTS
DOUBLE WORD → 52TRIPLE WORD → 78
MEANING

What does extension phone mean?

NOUN · 1 SENSE
1

An additional telephone set that is connected to the same telephone line.