Descriptive vs. suggestive marks: examples

How clear is the line between descriptive and suggestive marks?

Even if a mark is descriptive, it can be protected & registered upon a showing of acquired distinctiveness.

HELD DESCRIPTIVE HELD SUGGESTIVE
AFTER TAN (after sunning lotion)
BED & BATH (store for bedroom & bathroom items)
FOOD FAIR (supermarket)
JOY (detergent)
PARTY AT A DISCOUNT (party arrangement services)
PIZZAZZ (pizza)
RAISIN-BRAN (raisin & bran cereal)
TENDER VITTLES (cat food)
WORLD BOOK (encyclopedia)
CHICKEN OF THE SEA (tuna fish)
CITIBANK (urban bank)
DIAL-A-MATTRESS (mattress sales)
COPPERTONE (sun tan oil)
L’EGGS (womens’ hosiery)
ROACH MOTEL (insect trap)
SEVENTEEN (teen-age magazines)
SPRAY ‘N VAC (aerosol rug cleaner)
SWEETARTS (candy)

Source: McCarthy on Trademarks 11:24, 11:72

Added Jan. 26, 2015