Considering this, does uncommon mean rare?
Anything uncommon is rare or unusual, like your uncommon last name, which all of your friends have trouble pronouncing. When you add the prefix un- to common, "occurring or done often," you get its opposite, uncommon.
Subsequently, question is, is Rarer a real word? Comparative form of rare: more rare.
Herein, what is the least common word?
1.abate: reduce or lesson. 2.abdicate: give up a position. 3.aberration: something unusual, different from the norm. 4.abhor: to really hate.
What do you call a rare person?
Noun. A rare or unique person or thing. rara avis. rarity. anomaly.