s, a, o, e, l, p, c, r, t, i, v are letters that make 'postal service'
ER, ice, ICE, RV, os, OS, vice, PO, IC, Post, Service, SE, vi, ic, postal, CE, service, post, VI, AL, Po, Al, Ce, Er, Os, Se, Ta are words within 'postal service'
1 possible definitions for 'postal service'
Under this definition, postal service is a noun and has the following properties:
mail, mail service, post have the same meaning as 'postal service'
'postal service' can be a type of communication, communicating.
airmail, airpost, snail mail, rural free delivery, RFD are types of 'postal service'.
mail, get off, send, post, postal are derivatives of 'postal service'.