IPA: //ˈrʌbəriər//
KK: /ˈrʌbəriər/
More flexible and softer than something that is rubbery.
The new material is rubberier than the old one, making it easier to mold.
Comparative: rubberier
Superlative: rubberiest
The word 'rubberier' is derived from 'rubber' (from the verb 'to rub', which comes from the action of rubbing) and the suffix '-ier' (meaning one who). Thus, 'rubberier' refers to one who rubs or uses rubber.
Think of someone who 'rubs' ('rubber') and the '-ier' indicates a person. This helps you remember that a 'rubberier' is someone who uses or works with rubber.
No commonly confused words.