[ionic 4] How to use Pipe in replace HTML markup?

How can use Pipe in replace function with HTML markup in Angular?

Angular HTML:

<ion-list class="item-autocom" *ngFor="let word of words">
    {{ word | replace }}

Angular TS Pipe:

import { Pipe, PipeTransform } from '@angular/core';

  name: 'replace'
export class ReplacePipe implements PipeTransform {
  transform(value: any, args?: any): any {

    return value.replace('h', 'gi', '<b>DISCOURSE_PLACEHOLDER_1</b>');


This is the output:

<b>$&</b> allo

But I need: