How to add additional space after heading in text widget

I am building a website using PageBuilder and have multiple rows with 3 columns in each and a text widget. I want to have a heading, picture and text describing the picture in each widget. However, once I get the widgets filled, some of the headings are too long and jump to 2-3 lines, making the pictures and text out of line with the pictures and text with the shorter headings. I need to add additional space after the shorter titles to get them to line up on multiple browsers. I’m thinking it may require additional CSS, but I can’t figure it out. Please help!