Onside

adj. kind, thoughtful everyday

What it means

Supportive of and in agreement with someone.

Reach for it when describing someone as supportive of a plan, person, or position

Once the nurse understood the change, she was fully onside.

Words to choose between 6

By register, from playful at the top to literary at the bottom. Tap a word to see when it fits.
playful
everyday
  • Onside (this word)
warm
professional
formal
  • playful

    aboard

    Fits when informal commitment to a plan is meant

    Careful Aboard can sound American and project-specific.

  • warm

    an ally

    Fits when ongoing support is relational and active

    Careful Ally is a stronger identity and requires behavior.

  • warm

    supportive

    Fits when active encouragement is the key quality

    Careful Support can be partial or conditional.

  • professional

    aligned

    Fits when goals or interests point in the same direction

    Careful Alignment can be temporary and strategic.

  • professional

    in agreement

    Fits when shared position is all that is known

    Careful Agreement does not guarantee active help.

  • formal

    sympathetic

    Fits when understanding makes someone receptive

    Careful Sympathy falls short of endorsement.

Opposites 3

  • opposed
  • hostile
  • against

Common phrases 3

  • get someone onside

    Early consultation helped get the nursing team onside.

  • kept residents onside

    Clear updates kept residents onside during the road closure.

  • fully onside

    Once she saw the access plan, the principal was fully onside.

Usage notes

Keep in mind

Onside is chiefly British informal usage and can imply persuasion for strategic advantage rather than principled agreement.

Definitions and examples are written for this site. How words are chosen Recording: Paul2520, American accent, from Wikimedia Commons, CC0 Updated