When seeking to describe something that invigorates and strengthens, the word 'roborative' can be substituted with other synonyms. Some of these synonyms include 'revitalizing', 'energizing', 'rejuvenating', 'restorative', 'invigorating', 'tonic', and 'stimulating'. These words are often used to describe things like food, drinks, exercises, activities, and even relationships. For example, a brisk walk on a beautiful day can be described as 'invigorating', while a warm cup of tea on a cold day can be described as 'restorative'. Overall, using synonyms for 'roborative' helps to add variety and depth to our language when expressing the stimulating effects of different things in our lives.