Defenselessly is defined as being without protection or means of defense. There are several synonyms for this word that can be used in different contexts. Vulnerably is a good substitute when referring to someone who is in a weak or powerless position. Helplessly implies a lack of ability to protect oneself and is often used in situations where a person is completely reliant on others. Unprotected can be used to describe individuals or objects that are susceptible to harm or danger. Exposed could also be used in a similar manner to describe someone who is left open to attack or criticism. In summary, there are different synonyms for 'defenselessly' that convey the same meaning depending on the situation.