Below are the words that matched your query...
Unifying
- tending to unify  
- combining into a single unit  
- join or combine; "We merged our resources"  
- become one; "Germany unified officially in 1990"; "the cells merge"  
- to bring or combine together or with something else; "resourcefully he mingled music and dance"  
- act in concert or unite in a common purpose or belief  
- bring together for a common purpose or action or ideology or in a shared situation; "the Democratic Patry platform united several splinter groups"  
Up In The Air
- very uncertain; "left everything up in the air"  
- not yet determined; "plans are still up in the air"  
- very uncertain; "left everything up in the air"
- not yet determined; "plans are still up in the air"
Unsure
- lacking or indicating lack of confidence or assurance; "uncertain of his convictions"; "unsure of himself and his future"; "moving with uncertain (or unsure) steps"; "an uncertain smile"; "touched the ornaments with uncertain fingers"  
- lacking self-confidence; "stood in the doorway diffident and abashed"; "problems that call for bold not timid responses"; "a very unsure young man"  
Unconvinced
- lacking conviction; "I remain unconvinced"  
Uncertified
- lacking requisite official documentation or endorsement  
Unavoidable
- impossible to avoid or evade:"inescapable conclusion"; "an ineluctable destiny"; "an unavoidable accident"  
Unpreventable
- not preventable; "unpreventable hysteria"  
Unstable
- subject to change; variable; "a fluid situation fraught with uncertainty"; "everything was unstable following the coup"  
- affording no ease or reassurance; "a precarious truce"  
- highly or violently reactive; "sensitive and highly unstable compounds"  
- disposed to psychological variability; "his rather unstable religious convictions"  
- suffering from severe mental illness; "of unsound mind"  
- lacking stability or fixity or firmness; "unstable political conditions"; "the tower proved to be unstable in the high wind"; "an unstable world economy"  
Unchangeable
- not changeable or subject to change; "a fixed and unchangeable part of the germ plasm"-Ashley Montagu; "the unchangeable seasons"; "one of the unchangeable facts of life"  
Unalterable
- remaining the same for indefinitely long times  
- of a sentence; that cannot be changed; "an unalterable death sentence"  
- not capable of being changed or altered; "unalterable resolve"; "an unalterable ground rule"