1) All 2) Exclusively 3) Only 4) Wholly 1) Alone 2) Entirely 3) Exclusively 4) Exclusively, only 5) In an exclusive manner 6) Involving no one else 7) Just 8) One way to be responsible 9) Only 10) Singly 11) To the exclusion of all else 12) Without another 
• (adv.) Singly; alone; only; without another; as, to rest a cause solely one argument; to rely solelyn one`s own strength.
Sole'ly adverb Singly; alone; only; without another; as, to rest a cause solely one argument; to rely solely n one's own strength. 
solely 1. To the exclusion of all else or others. 2. Done for just one reason.