Synonyms of the word

single-handed

• adj. Without help from others; unassisted.
• adj. Using only one hand.
• adj. Designed for only one hand.
• adv. In a single-handed manner.

independent

• adj. not dependent; not contingent or depending on something else; free.
• adj. (politics) not affiliated with any political party.
• adj. Providing a comfortable livelihood.
• adj. Not subject to bias or influence; self-directing.
• adj. Separate from; exclusive; irrespective.
• n. A candidate or voter not affiliated with any political party, a freethinker, free of a party platform.
• n. A neutral or uncommitted person.
• n. (sports) A team not affiliated with any league or conference.

single-handedly

• adv. Alone; without assistance; by oneself.

unassisted

• adj. Not assisted; without assistance.
• adv. Without assistance.

unbacked

• adj. Having no back.
• adj. Having no (or few) backers.

unsupported

• adj. Without physical support.
• adj. For which support or help is not available.
• adj. Without confirmation from a credible source, without verifying support.