Final answer:
The term that describes using words of praise or positivity without concrete reasons is flattery, which tends to be unfounded and lacking in factual support, unlike other language forms such as metaphor and hyperbole.
Step-by-step explanation:
The term you are looking for when referring to the use of words of praise or positivity toward a person, place, or thing without giving concrete reasons is flattery. This is often considered the opposite of name-calling or vilification, where the latter involves speaking or writing about someone or something in a wholly negative light. Flattery bypasses critical evaluation and instead applies positive comments, which may not be supported by factual evidence. This concept is distinct from sarcasm, irony, euphemisms, and hyperbole, all of which have their own specific roles and effects in language.
In addition to flattery, it is essential to understand other forms of language such as metaphor, which involves describing one thing as another for rhetorical effect without using "like" or "as"; and hyperbole, which is an exaggeration used to create emphasis or effect. Understanding these different elements helps us recognize the tools writers use to convey meaning and affect the audience's perception.