Unilaterally rhymes with:
bilaterally, multilaterally, bilaterally, multilaterally, bilaterally, contradictorily, literally, multilaterally, agriculturally, architecturally, behaviorally, bilaterally, contradictorily, culturally, federally, generally, liberally, literally, multilaterally, naturally, peripherally, procedurally, structurally, temporally, unnaturally, viscerally