Takes entry of a taxonomy $tax and returns posts of the same post type (due to line 15) with same terms.

matching-terms.php

<?php
// @param string $tax A taxonomy slug to match
function slug_name( $tax ) {
    // get ids for all terms with matching $tax
    $terms = get_the_terms( get_the_id(), $tax );
		//test if there are any terms if so continue, if not then skip this
		if ( ! empty( $terms ) ) {
			//get the taxnomy slug foreach and put in $cats array to be fed to WP_Query
			$cats = array();
			foreach ( $terms as $term ) {
				$cats[] = $term->slug;
			}
			//query for posts in the same category(s).
			$args = array(
	                	'post_type' => get_post_type(),
	                	'tax_query' => array(
		                	array(
		                        	'taxonomy' => $tax,
		                        	'field' => 'slug',
		                        	'terms' => $cats,
		                    	),
		                 ),
			);
			$query = new WP_Query( $args );
			//run the loop, do whatever you have to do there.
			while ( $query->have_posts() ) : $query->the_post();
				//Show the titles of queried posts as links
				the_title( '<p class="feature-group pull-left"><a href="' . get_permalink() .'" title="' . sprintf( esc_attr__( 'Permalink to %s', 'text-domain' ), the_title_attribute( 'echo=0' ) ) . '" rel="bookmark">', '</a>&nbsp;&nbsp;</p>');
			endwhile; //have posts
		wp_reset_postdata();
	} //endif we have terms
}