chemistry, physics, etc.
laboratory

sit (BrE), take
fail, pass
I passed the written exam but failed the practical.

be, prove, seem, sound
become, get
It's time to get practical!

make sth
a feature that makes the system more practical

do sth
I'll do something practical now and answer some mail.

extremely, fairly, very, etc.
She always adopted a very practical tone.

eminently, highly, intensely
entirely, purely, strictly
For entirely practical reasons, children are not invited.

hardly

Practical is used with these nouns:
advantage, advice, alternative, application, approach, arrangement, aspect, assistance, benefit, common sense, consequence, consideration, context, criticism, demand, demonstration, detail, difficulty, effect, end, exam, examination, example, exercise, experience, experiment, expression, guidance, guide, guideline, help, hint, implementation, implication, importance, initiative, instruction, joke, know-how, knowledge, level, limit, limitation, matter, measure, method, nature, necessity, nurse, option, outcome, point of view, pointer, politics, possibility, problem, proposition, purpose, reality, reason, reasoning, recommendation, reform, relevance, sense, significance, skill, solution, standpoint, step, suggestion, support, term, test, theology, tip, tool, training, use, usefulness, utility, value, way, wisdom, work, workshop