busy and working – synonyms and related words | Macmillan Dictionary

active

adjective

regularly doing a particular activity

at work

phrase

in the process of doing or making something

busily

adverb

if you are busily doing something, you are giving all your attention to it

busy

adjective

a busy time is when you have a lot of things to do

busy

adjective

having many customers

in action

phrase

doing what you are good at or what you are trained to do

in action

phrase

doing what something is designed to do

on the case

phrase

dealing with something

on the move

phrase

informal busy or active all the time

operational

adjective

relating to the way that something works, especially a system or business

put-upon

adjective

informal asked to do too much because you are kind and helpful

snowed under

phrase

with too much work to deal with

tied up

adjective

if someone is tied up, they are very busy

working overtime

phrase

much more active than usual