Collocations for fixed - adj.

be, seem
become
remain, stay

very
firmly, securely (both esp. BrE)
Check that the boards are all securely fixed.

rigidly
His gaze was rigidly fixed ahead.

relatively
permanently

Fixed is used with these nouns:
asset, bayonet, budget, capital, charge, commission, cost, distance, fee, gaze, idea, income, instalment, interval, limit, menu, number, penalty, percentage, period, point, price, proportion, rate, rent, scale, sight, smile, sum, target, term, wing