by Mike Selinker, Dan Katz, and Meta Group A
Answer: SLINGSHOTS

Each of these eight answers is a consonancy of a solar system planet plus one extra consonant. These can be ordered by planet order:

• AMERICARES = MERCURY + S
• LOVE-INS = VENUS + L
• RAYTHEON = EARTH + N
• EMIGRES = MARS + G
• JEEPSTER = JUPITER + S
• HISTORIAN = SATURN + H
• REUNITES = URANUS + T
• IN POSITION = NEPTUNE + S

These added letters are a consonancy of the word SLINGSHOTS.