Words to Describe preventives

How preventives often is described ("________ preventives")

• moral
• useful
• rust
• efficacious
• necessary
• adequate
• chief
• certain
• various
• called
• cold
• infallible
• temporary
• only
• potent
• effectual
• natural
• fit
• important
• excellent
• continual
• sure
• artificial
• inorganic
• chemical
• mechanical
• known
• better
• usual
• best
• scale
• bituminous
• surest
• daily
• sunburn
• strongest
• helpful
• true
• dental
• greatest
• valuable
• effective
• possible
• monthly
• sovereign
• proper
• powerful
• weak
• good
• alleged
• efficient
• absolute
• other
• rational