Chuckle, the verb, refers to a soft and gentle laugh. Therefore, chuckler is a person who chuckles. There are many other terms for people who laugh in different ways. For instance, giggler refers to a person who laughs in a high-pitched and uncontrollable manner. A snickerer is someone who laughs quietly or in a suppressed manner. A chortler is someone who chuckles in a hooting and gleeful way. A grinner smiles broadly and may chuckle quietly. A guffawer is someone who laughs out loud, usually in a boisterous way. So, these are some of the synonyms for the word chuckler, depending on how people laugh.