1. Relating to a historical tendency for a language to reduce its use of inflections
   - syncretic, syncretistic, syncretistical 
2. Of or characterized by syncretism
   - syncretic, syncretistic, syncretistical

See also: syncretism

• American state
• American Stock Exchange
• American sweet chestnut
• American sweet gum
• American sycamore
• American toad
• American turkey oak
• American twinflower
• American Virgin Islands
• American wall fern
• American War of Independence
• American water ouzel
• American water shrew
• American water spaniel
• American watercress
• American white birch
• American white oak
• American white pine
• American widgeon
• American wistaria
• American wisteria
• American woodcock
• American wormseed
• American-Indian language
• Americana